Home / 20,813.76-28,695.87-15,149.43

Finding the Fourth Proportional to 20,813.76, 28,695.87 and 15,149.43

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Solution

The fourth proportional to 20,813.76, 28,695.87 and 15,149.43 is: 20,886.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.76 : 28,695.87 = 15,149.43 : x
  2. Step 2: Convert to fraction form
    20,813.76/28,695.87 = 15,149.43/x
  3. Step 3: Cross multiply
    20,813.76x = 28,695.87 × 15,149.43
  4. Step 4: Simplify right side
    20,813.76x = 434,726,073.85
  5. Step 5: Solve for x
    x = 434,726,073.85/20,813.76
  6. Step 6: Final answer
    x = 20,886.47

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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.