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Finding the Fourth Proportional to 16,230.76, 22,398.31 and 8,778.76

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Solution

The fourth proportional to 16,230.76, 22,398.31 and 8,778.76 is: 12,114.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,230.76 : 22,398.31 = 8,778.76 : x
  2. Step 2: Convert to fraction form
    16,230.76/22,398.31 = 8,778.76/x
  3. Step 3: Cross multiply
    16,230.76x = 22,398.31 × 8,778.76
  4. Step 4: Simplify right side
    16,230.76x = 196,629,387.90
  5. Step 5: Solve for x
    x = 196,629,387.90/16,230.76
  6. Step 6: Final answer
    x = 12,114.61

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Find fourth proportional to 8,115.38, 11,199.16 and 4,389.38
Half scale
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Double scale
Find fourth proportional to 16,231.76, 22,399.69 and 8,779.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.