Home / 10,660.60-15,990.90-5,112.64

Finding the Fourth Proportional to 10,660.60, 15,990.90 and 5,112.64

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Solution

The fourth proportional to 10,660.60, 15,990.90 and 5,112.64 is: 7,668.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,660.60 : 15,990.90 = 5,112.64 : x
  2. Step 2: Convert to fraction form
    10,660.60/15,990.90 = 5,112.64/x
  3. Step 3: Cross multiply
    10,660.60x = 15,990.90 × 5,112.64
  4. Step 4: Simplify right side
    10,660.60x = 81,755,714.98
  5. Step 5: Solve for x
    x = 81,755,714.98/10,660.60
  6. Step 6: Final answer
    x = 7,668.96

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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.