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Finding the Fourth Proportional to 7,252, 10,007.88 and 3,940

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Solution

The fourth proportional to 7,252, 10,007.88 and 3,940 is: 5,437.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,252 : 10,007.88 = 3,940 : x
  2. Step 2: Convert to fraction form
    7,252/10,007.88 = 3,940/x
  3. Step 3: Cross multiply
    7,252x = 10,007.88 × 3,940
  4. Step 4: Simplify right side
    7,252x = 39,431,047.20
  5. Step 5: Solve for x
    x = 39,431,047.20/7,252
  6. Step 6: Final answer
    x = 5,437.27

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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.