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Finding the Fourth Proportional to 28,687.80, 42,939.61 and 15,327.41

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Solution

The fourth proportional to 28,687.80, 42,939.61 and 15,327.41 is: 22,941.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.80 : 42,939.61 = 15,327.41 : x
  2. Step 2: Convert to fraction form
    28,687.80/42,939.61 = 15,327.41/x
  3. Step 3: Cross multiply
    28,687.80x = 42,939.61 × 15,327.41
  4. Step 4: Simplify right side
    28,687.80x = 658,153,007.71
  5. Step 5: Solve for x
    x = 658,153,007.71/28,687.80
  6. Step 6: Final answer
    x = 22,941.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.