Home / 20,876.20-31,279.08-10,332.16

Finding the Fourth Proportional to 20,876.20, 31,279.08 and 10,332.16

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Solution

The fourth proportional to 20,876.20, 31,279.08 and 10,332.16 is: 15,480.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.20 : 31,279.08 = 10,332.16 : x
  2. Step 2: Convert to fraction form
    20,876.20/31,279.08 = 10,332.16/x
  3. Step 3: Cross multiply
    20,876.20x = 31,279.08 × 10,332.16
  4. Step 4: Simplify right side
    20,876.20x = 323,180,459.21
  5. Step 5: Solve for x
    x = 323,180,459.21/20,876.20
  6. Step 6: Final answer
    x = 15,480.81

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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.