Home / 20,711.38-31,063.56-10,178.68

Finding the Fourth Proportional to 20,711.38, 31,063.56 and 10,178.68

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Solution

The fourth proportional to 20,711.38, 31,063.56 and 10,178.68 is: 15,266.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.38 : 31,063.56 = 10,178.68 : x
  2. Step 2: Convert to fraction form
    20,711.38/31,063.56 = 10,178.68/x
  3. Step 3: Cross multiply
    20,711.38x = 31,063.56 × 10,178.68
  4. Step 4: Simplify right side
    20,711.38x = 316,186,036.90
  5. Step 5: Solve for x
    x = 316,186,036.90/20,711.38
  6. Step 6: Final answer
    x = 15,266.29

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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.