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Finding the Fourth Proportional to 15,773.16, 21,766.80 and 8,699.64

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Solution

The fourth proportional to 15,773.16, 21,766.80 and 8,699.64 is: 12,005.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,773.16 : 21,766.80 = 8,699.64 : x
  2. Step 2: Convert to fraction form
    15,773.16/21,766.80 = 8,699.64/x
  3. Step 3: Cross multiply
    15,773.16x = 21,766.80 × 8,699.64
  4. Step 4: Simplify right side
    15,773.16x = 189,363,323.95
  5. Step 5: Solve for x
    x = 189,363,323.95/15,773.16
  6. Step 6: Final answer
    x = 12,005.41

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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.