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Finding the Fourth Proportional to 13,251.62, 18,287.12 and 7,201.82

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Solution

The fourth proportional to 13,251.62, 18,287.12 and 7,201.82 is: 9,938.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.62 : 18,287.12 = 7,201.82 : x
  2. Step 2: Convert to fraction form
    13,251.62/18,287.12 = 7,201.82/x
  3. Step 3: Cross multiply
    13,251.62x = 18,287.12 × 7,201.82
  4. Step 4: Simplify right side
    13,251.62x = 131,700,510.55
  5. Step 5: Solve for x
    x = 131,700,510.55/13,251.62
  6. Step 6: Final answer
    x = 9,938.45

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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.