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Finding the Fourth Proportional to 15,773.20, 21,766.98 and 8,699.44

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Solution

The fourth proportional to 15,773.20, 21,766.98 and 8,699.44 is: 12,005.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,773.20 : 21,766.98 = 8,699.44 : x
  2. Step 2: Convert to fraction form
    15,773.20/21,766.98 = 8,699.44/x
  3. Step 3: Cross multiply
    15,773.20x = 21,766.98 × 8,699.44
  4. Step 4: Simplify right side
    15,773.20x = 189,360,536.49
  5. Step 5: Solve for x
    x = 189,360,536.49/15,773.20
  6. Step 6: Final answer
    x = 12,005.21

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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.