Home / 10,120.60-15,162.18-8,487.64

Finding the Fourth Proportional to 10,120.60, 15,162.18 and 8,487.64

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Solution

The fourth proportional to 10,120.60, 15,162.18 and 8,487.64 is: 12,715.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.60 : 15,162.18 = 8,487.64 : x
  2. Step 2: Convert to fraction form
    10,120.60/15,162.18 = 8,487.64/x
  3. Step 3: Cross multiply
    10,120.60x = 15,162.18 × 8,487.64
  4. Step 4: Simplify right side
    10,120.60x = 128,691,125.46
  5. Step 5: Solve for x
    x = 128,691,125.46/10,120.60
  6. Step 6: Final answer
    x = 12,715.76

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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.