Home / 20,282.48-30,432.78-12,884.92

Finding the Fourth Proportional to 20,282.48, 30,432.78 and 12,884.92

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Solution

The fourth proportional to 20,282.48, 30,432.78 and 12,884.92 is: 19,333.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.48 : 30,432.78 = 12,884.92 : x
  2. Step 2: Convert to fraction form
    20,282.48/30,432.78 = 12,884.92/x
  3. Step 3: Cross multiply
    20,282.48x = 30,432.78 × 12,884.92
  4. Step 4: Simplify right side
    20,282.48x = 392,123,935.68
  5. Step 5: Solve for x
    x = 392,123,935.68/20,282.48
  6. Step 6: Final answer
    x = 19,333.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.