Home / 20,663.91-28,515.60-11,712.24

Finding the Fourth Proportional to 20,663.91, 28,515.60 and 11,712.24

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Solution

The fourth proportional to 20,663.91, 28,515.60 and 11,712.24 is: 16,162.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.91 : 28,515.60 = 11,712.24 : x
  2. Step 2: Convert to fraction form
    20,663.91/28,515.60 = 11,712.24/x
  3. Step 3: Cross multiply
    20,663.91x = 28,515.60 × 11,712.24
  4. Step 4: Simplify right side
    20,663.91x = 333,981,550.94
  5. Step 5: Solve for x
    x = 333,981,550.94/20,663.91
  6. Step 6: Final answer
    x = 16,162.55

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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.