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Finding the Fourth Proportional to 12,442, 17,170.80 and 7,137.04

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Solution

The fourth proportional to 12,442, 17,170.80 and 7,137.04 is: 9,849.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,442 : 17,170.80 = 7,137.04 : x
  2. Step 2: Convert to fraction form
    12,442/17,170.80 = 7,137.04/x
  3. Step 3: Cross multiply
    12,442x = 17,170.80 × 7,137.04
  4. Step 4: Simplify right side
    12,442x = 122,548,686.43
  5. Step 5: Solve for x
    x = 122,548,686.43/12,442
  6. Step 6: Final answer
    x = 9,849.60

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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.