Home / 28,687.17-39,588.05-15,766.61

Finding the Fourth Proportional to 28,687.17, 39,588.05 and 15,766.61

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Solution

The fourth proportional to 28,687.17, 39,588.05 and 15,766.61 is: 21,757.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.17 : 39,588.05 = 15,766.61 : x
  2. Step 2: Convert to fraction form
    28,687.17/39,588.05 = 15,766.61/x
  3. Step 3: Cross multiply
    28,687.17x = 39,588.05 × 15,766.61
  4. Step 4: Simplify right side
    28,687.17x = 624,169,068.24
  5. Step 5: Solve for x
    x = 624,169,068.24/28,687.17
  6. Step 6: Final answer
    x = 21,757.78

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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.