Home / 10,079.38-15,120.64-5,146.35

Finding the Fourth Proportional to 10,079.38, 15,120.64 and 5,146.35

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Solution

The fourth proportional to 10,079.38, 15,120.64 and 5,146.35 is: 7,720.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,079.38 : 15,120.64 = 5,146.35 : x
  2. Step 2: Convert to fraction form
    10,079.38/15,120.64 = 5,146.35/x
  3. Step 3: Cross multiply
    10,079.38x = 15,120.64 × 5,146.35
  4. Step 4: Simplify right side
    10,079.38x = 77,816,105.66
  5. Step 5: Solve for x
    x = 77,816,105.66/10,079.38
  6. Step 6: Final answer
    x = 7,720.33

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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.