Home / 20,728.28-31,092.10-5,146.04

Finding the Fourth Proportional to 20,728.28, 31,092.10 and 5,146.04

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Solution

The fourth proportional to 20,728.28, 31,092.10 and 5,146.04 is: 7,718.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.28 : 31,092.10 = 5,146.04 : x
  2. Step 2: Convert to fraction form
    20,728.28/31,092.10 = 5,146.04/x
  3. Step 3: Cross multiply
    20,728.28x = 31,092.10 × 5,146.04
  4. Step 4: Simplify right side
    20,728.28x = 160,001,190.28
  5. Step 5: Solve for x
    x = 160,001,190.28/20,728.28
  6. Step 6: Final answer
    x = 7,718.98

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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.