Home / 20,490.53-28,276.17-11,415.68

Finding the Fourth Proportional to 20,490.53, 28,276.17 and 11,415.68

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Solution

The fourth proportional to 20,490.53, 28,276.17 and 11,415.68 is: 15,753.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.53 : 28,276.17 = 11,415.68 : x
  2. Step 2: Convert to fraction form
    20,490.53/28,276.17 = 11,415.68/x
  3. Step 3: Cross multiply
    20,490.53x = 28,276.17 × 11,415.68
  4. Step 4: Simplify right side
    20,490.53x = 322,791,694.40
  5. Step 5: Solve for x
    x = 322,791,694.40/20,490.53
  6. Step 6: Final answer
    x = 15,753.21

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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.