Home / 20,863.78-28,792.68-11,432.92

Finding the Fourth Proportional to 20,863.78, 28,792.68 and 11,432.92

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Solution

The fourth proportional to 20,863.78, 28,792.68 and 11,432.92 is: 15,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.78 : 28,792.68 = 11,432.92 : x
  2. Step 2: Convert to fraction form
    20,863.78/28,792.68 = 11,432.92/x
  3. Step 3: Cross multiply
    20,863.78x = 28,792.68 × 11,432.92
  4. Step 4: Simplify right side
    20,863.78x = 329,184,407.03
  5. Step 5: Solve for x
    x = 329,184,407.03/20,863.78
  6. Step 6: Final answer
    x = 15,777.79

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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.