Home / 20,862.92-28,791.18-11,430.86

Finding the Fourth Proportional to 20,862.92, 28,791.18 and 11,430.86

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Solution

The fourth proportional to 20,862.92, 28,791.18 and 11,430.86 is: 15,774.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.92 : 28,791.18 = 11,430.86 : x
  2. Step 2: Convert to fraction form
    20,862.92/28,791.18 = 11,430.86/x
  3. Step 3: Cross multiply
    20,862.92x = 28,791.18 × 11,430.86
  4. Step 4: Simplify right side
    20,862.92x = 329,107,947.81
  5. Step 5: Solve for x
    x = 329,107,947.81/20,862.92
  6. Step 6: Final answer
    x = 15,774.78

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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.