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Finding the Fourth Proportional to 10,080.90, 15,121.35 and 7,164.90

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Solution

The fourth proportional to 10,080.90, 15,121.35 and 7,164.90 is: 10,747.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,080.90 : 15,121.35 = 7,164.90 : x
  2. Step 2: Convert to fraction form
    10,080.90/15,121.35 = 7,164.90/x
  3. Step 3: Cross multiply
    10,080.90x = 15,121.35 × 7,164.90
  4. Step 4: Simplify right side
    10,080.90x = 108,342,960.62
  5. Step 5: Solve for x
    x = 108,342,960.62/10,080.90
  6. Step 6: Final answer
    x = 10,747.35

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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.