Home / 20,864.31-31,304.43-12,550.20

Finding the Fourth Proportional to 20,864.31, 31,304.43 and 12,550.20

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Solution

The fourth proportional to 20,864.31, 31,304.43 and 12,550.20 is: 18,830.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.31 : 31,304.43 = 12,550.20 : x
  2. Step 2: Convert to fraction form
    20,864.31/31,304.43 = 12,550.20/x
  3. Step 3: Cross multiply
    20,864.31x = 31,304.43 × 12,550.20
  4. Step 4: Simplify right side
    20,864.31x = 392,876,857.39
  5. Step 5: Solve for x
    x = 392,876,857.39/20,864.31
  6. Step 6: Final answer
    x = 18,830.09

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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.