Home / 20,747.71-31,121.58-5,165.34

Finding the Fourth Proportional to 20,747.71, 31,121.58 and 5,165.34

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Solution

The fourth proportional to 20,747.71, 31,121.58 and 5,165.34 is: 7,748.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.71 : 31,121.58 = 5,165.34 : x
  2. Step 2: Convert to fraction form
    20,747.71/31,121.58 = 5,165.34/x
  3. Step 3: Cross multiply
    20,747.71x = 31,121.58 × 5,165.34
  4. Step 4: Simplify right side
    20,747.71x = 160,753,542.04
  5. Step 5: Solve for x
    x = 160,753,542.04/20,747.71
  6. Step 6: Final answer
    x = 7,748.01

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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.