Home / 10,120.40-15,165.22-7,164.88

Finding the Fourth Proportional to 10,120.40, 15,165.22 and 7,164.88

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Solution

The fourth proportional to 10,120.40, 15,165.22 and 7,164.88 is: 10,736.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.40 : 15,165.22 = 7,164.88 : x
  2. Step 2: Convert to fraction form
    10,120.40/15,165.22 = 7,164.88/x
  3. Step 3: Cross multiply
    10,120.40x = 15,165.22 × 7,164.88
  4. Step 4: Simplify right side
    10,120.40x = 108,656,981.47
  5. Step 5: Solve for x
    x = 108,656,981.47/10,120.40
  6. Step 6: Final answer
    x = 10,736.43

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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.