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Finding the Fourth Proportional to 15,487.80, 21,373.92 and 8,773.08

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Solution

The fourth proportional to 15,487.80, 21,373.92 and 8,773.08 is: 12,107.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.80 : 21,373.92 = 8,773.08 : x
  2. Step 2: Convert to fraction form
    15,487.80/21,373.92 = 8,773.08/x
  3. Step 3: Cross multiply
    15,487.80x = 21,373.92 × 8,773.08
  4. Step 4: Simplify right side
    15,487.80x = 187,515,110.07
  5. Step 5: Solve for x
    x = 187,515,110.07/15,487.80
  6. Step 6: Final answer
    x = 12,107.28

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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.