Home / 20,863.91-28,792.21-11,432.47

Finding the Fourth Proportional to 20,863.91, 28,792.21 and 11,432.47

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Solution

The fourth proportional to 20,863.91, 28,792.21 and 11,432.47 is: 15,776.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.91 : 28,792.21 = 11,432.47 : x
  2. Step 2: Convert to fraction form
    20,863.91/28,792.21 = 11,432.47/x
  3. Step 3: Cross multiply
    20,863.91x = 28,792.21 × 11,432.47
  4. Step 4: Simplify right side
    20,863.91x = 329,166,077.06
  5. Step 5: Solve for x
    x = 329,166,077.06/20,863.91
  6. Step 6: Final answer
    x = 15,776.82

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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.