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Finding the Fourth Proportional to 7,242.31, 9,993.68 and 4,258.88

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Solution

The fourth proportional to 7,242.31, 9,993.68 and 4,258.88 is: 5,876.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,242.31 : 9,993.68 = 4,258.88 : x
  2. Step 2: Convert to fraction form
    7,242.31/9,993.68 = 4,258.88/x
  3. Step 3: Cross multiply
    7,242.31x = 9,993.68 × 4,258.88
  4. Step 4: Simplify right side
    7,242.31x = 42,561,866.06
  5. Step 5: Solve for x
    x = 42,561,866.06/7,242.31
  6. Step 6: Final answer
    x = 5,876.83

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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.