Home / 20,372.74-28,128.13-12,727.70

Finding the Fourth Proportional to 20,372.74, 28,128.13 and 12,727.70

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Solution

The fourth proportional to 20,372.74, 28,128.13 and 12,727.70 is: 17,572.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.74 : 28,128.13 = 12,727.70 : x
  2. Step 2: Convert to fraction form
    20,372.74/28,128.13 = 12,727.70/x
  3. Step 3: Cross multiply
    20,372.74x = 28,128.13 × 12,727.70
  4. Step 4: Simplify right side
    20,372.74x = 358,006,491.44
  5. Step 5: Solve for x
    x = 358,006,491.44/20,372.74
  6. Step 6: Final answer
    x = 17,572.82

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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.