Home / 20,939.48-31,398.96-7,612.04

Finding the Fourth Proportional to 20,939.48, 31,398.96 and 7,612.04

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Solution

The fourth proportional to 20,939.48, 31,398.96 and 7,612.04 is: 11,414.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.48 : 31,398.96 = 7,612.04 : x
  2. Step 2: Convert to fraction form
    20,939.48/31,398.96 = 7,612.04/x
  3. Step 3: Cross multiply
    20,939.48x = 31,398.96 × 7,612.04
  4. Step 4: Simplify right side
    20,939.48x = 239,010,139.48
  5. Step 5: Solve for x
    x = 239,010,139.48/20,939.48
  6. Step 6: Final answer
    x = 11,414.33

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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.