Home / 20,358.27-30,517.95-12,939.75

Finding the Fourth Proportional to 20,358.27, 30,517.95 and 12,939.75

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Solution

The fourth proportional to 20,358.27, 30,517.95 and 12,939.75 is: 19,397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.27 : 30,517.95 = 12,939.75 : x
  2. Step 2: Convert to fraction form
    20,358.27/30,517.95 = 12,939.75/x
  3. Step 3: Cross multiply
    20,358.27x = 30,517.95 × 12,939.75
  4. Step 4: Simplify right side
    20,358.27x = 394,894,643.51
  5. Step 5: Solve for x
    x = 394,894,643.51/20,358.27
  6. Step 6: Final answer
    x = 19,397.26

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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.