Home / 20,688.38-28,550.03-11,256.95

Finding the Fourth Proportional to 20,688.38, 28,550.03 and 11,256.95

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Solution

The fourth proportional to 20,688.38, 28,550.03 and 11,256.95 is: 15,534.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.38 : 28,550.03 = 11,256.95 : x
  2. Step 2: Convert to fraction form
    20,688.38/28,550.03 = 11,256.95/x
  3. Step 3: Cross multiply
    20,688.38x = 28,550.03 × 11,256.95
  4. Step 4: Simplify right side
    20,688.38x = 321,386,061.17
  5. Step 5: Solve for x
    x = 321,386,061.17/20,688.38
  6. Step 6: Final answer
    x = 15,534.62

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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.