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Finding the Fourth Proportional to 7,122.98, 10,691.12 and 3,615.48

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Solution

The fourth proportional to 7,122.98, 10,691.12 and 3,615.48 is: 5,426.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.98 : 10,691.12 = 3,615.48 : x
  2. Step 2: Convert to fraction form
    7,122.98/10,691.12 = 3,615.48/x
  3. Step 3: Cross multiply
    7,122.98x = 10,691.12 × 3,615.48
  4. Step 4: Simplify right side
    7,122.98x = 38,653,530.54
  5. Step 5: Solve for x
    x = 38,653,530.54/7,122.98
  6. Step 6: Final answer
    x = 5,426.60

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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.