Home / 20,747.76-31,121.36-5,165.52

Finding the Fourth Proportional to 20,747.76, 31,121.36 and 5,165.52

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Solution

The fourth proportional to 20,747.76, 31,121.36 and 5,165.52 is: 7,748.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.76 : 31,121.36 = 5,165.52 : x
  2. Step 2: Convert to fraction form
    20,747.76/31,121.36 = 5,165.52/x
  3. Step 3: Cross multiply
    20,747.76x = 31,121.36 × 5,165.52
  4. Step 4: Simplify right side
    20,747.76x = 160,758,007.51
  5. Step 5: Solve for x
    x = 160,758,007.51/20,747.76
  6. Step 6: Final answer
    x = 7,748.21

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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.