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Finding the Fourth Proportional to 7,130.90, 10,691.80 and 3,425.76

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Solution

The fourth proportional to 7,130.90, 10,691.80 and 3,425.76 is: 5,136.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.90 : 10,691.80 = 3,425.76 : x
  2. Step 2: Convert to fraction form
    7,130.90/10,691.80 = 3,425.76/x
  3. Step 3: Cross multiply
    7,130.90x = 10,691.80 × 3,425.76
  4. Step 4: Simplify right side
    7,130.90x = 36,627,532.20
  5. Step 5: Solve for x
    x = 36,627,532.20/7,130.90
  6. Step 6: Final answer
    x = 5,136.45

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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.