Home / 20,393.76-28,145.52-11,443.68

Finding the Fourth Proportional to 20,393.76, 28,145.52 and 11,443.68

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Solution

The fourth proportional to 20,393.76, 28,145.52 and 11,443.68 is: 15,793.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.76 : 28,145.52 = 11,443.68 : x
  2. Step 2: Convert to fraction form
    20,393.76/28,145.52 = 11,443.68/x
  3. Step 3: Cross multiply
    20,393.76x = 28,145.52 × 11,443.68
  4. Step 4: Simplify right side
    20,393.76x = 322,088,324.31
  5. Step 5: Solve for x
    x = 322,088,324.31/20,393.76
  6. Step 6: Final answer
    x = 15,793.47

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Half scale
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Double scale
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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.