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Finding the Fourth Proportional to 7,200.71, 9,937.13 and 4,218.69

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Solution

The fourth proportional to 7,200.71, 9,937.13 and 4,218.69 is: 5,821.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.71 : 9,937.13 = 4,218.69 : x
  2. Step 2: Convert to fraction form
    7,200.71/9,937.13 = 4,218.69/x
  3. Step 3: Cross multiply
    7,200.71x = 9,937.13 × 4,218.69
  4. Step 4: Simplify right side
    7,200.71x = 41,921,649.87
  5. Step 5: Solve for x
    x = 41,921,649.87/7,200.71
  6. Step 6: Final answer
    x = 5,821.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.