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Finding the Fourth Proportional to 10,080.70, 15,108.90 and 5,147.80

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Solution

The fourth proportional to 10,080.70, 15,108.90 and 5,147.80 is: 7,715.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,080.70 : 15,108.90 = 5,147.80 : x
  2. Step 2: Convert to fraction form
    10,080.70/15,108.90 = 5,147.80/x
  3. Step 3: Cross multiply
    10,080.70x = 15,108.90 × 5,147.80
  4. Step 4: Simplify right side
    10,080.70x = 77,777,595.42
  5. Step 5: Solve for x
    x = 77,777,595.42/10,080.70
  6. Step 6: Final answer
    x = 7,715.50

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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.