Home / 10,286.20-15,407.70-8,558.20

Finding the Fourth Proportional to 10,286.20, 15,407.70 and 8,558.20

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Solution

The fourth proportional to 10,286.20, 15,407.70 and 8,558.20 is: 12,819.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,286.20 : 15,407.70 = 8,558.20 : x
  2. Step 2: Convert to fraction form
    10,286.20/15,407.70 = 8,558.20/x
  3. Step 3: Cross multiply
    10,286.20x = 15,407.70 × 8,558.20
  4. Step 4: Simplify right side
    10,286.20x = 131,862,178.14
  5. Step 5: Solve for x
    x = 131,862,178.14/10,286.20
  6. Step 6: Final answer
    x = 12,819.33

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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.