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Finding the Fourth Proportional to 28,562.79, 39,414.98 and 15,815.26

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Solution

The fourth proportional to 28,562.79, 39,414.98 and 15,815.26 is: 21,824.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,562.79 : 39,414.98 = 15,815.26 : x
  2. Step 2: Convert to fraction form
    28,562.79/39,414.98 = 15,815.26/x
  3. Step 3: Cross multiply
    28,562.79x = 39,414.98 × 15,815.26
  4. Step 4: Simplify right side
    28,562.79x = 623,357,978.98
  5. Step 5: Solve for x
    x = 623,357,978.98/28,562.79
  6. Step 6: Final answer
    x = 21,824.13

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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.