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Finding the Fourth Proportional to 12,449.52, 17,181.90 and 7,146

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Solution

The fourth proportional to 12,449.52, 17,181.90 and 7,146 is: 9,862.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,449.52 : 17,181.90 = 7,146 : x
  2. Step 2: Convert to fraction form
    12,449.52/17,181.90 = 7,146/x
  3. Step 3: Cross multiply
    12,449.52x = 17,181.90 × 7,146
  4. Step 4: Simplify right side
    12,449.52x = 122,781,857.40
  5. Step 5: Solve for x
    x = 122,781,857.40/12,449.52
  6. Step 6: Final answer
    x = 9,862.38

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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.