Home / 10,082.20-15,107.10-8,429.80

Finding the Fourth Proportional to 10,082.20, 15,107.10 and 8,429.80

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Solution

The fourth proportional to 10,082.20, 15,107.10 and 8,429.80 is: 12,631.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,082.20 : 15,107.10 = 8,429.80 : x
  2. Step 2: Convert to fraction form
    10,082.20/15,107.10 = 8,429.80/x
  3. Step 3: Cross multiply
    10,082.20x = 15,107.10 × 8,429.80
  4. Step 4: Simplify right side
    10,082.20x = 127,349,831.58
  5. Step 5: Solve for x
    x = 127,349,831.58/10,082.20
  6. Step 6: Final answer
    x = 12,631.16

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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.