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Finding the Fourth Proportional to 12,387.70, 17,095.68 and 7,083.58

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Solution

The fourth proportional to 12,387.70, 17,095.68 and 7,083.58 is: 9,775.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.70 : 17,095.68 = 7,083.58 : x
  2. Step 2: Convert to fraction form
    12,387.70/17,095.68 = 7,083.58/x
  3. Step 3: Cross multiply
    12,387.70x = 17,095.68 × 7,083.58
  4. Step 4: Simplify right side
    12,387.70x = 121,098,616.93
  5. Step 5: Solve for x
    x = 121,098,616.93/12,387.70
  6. Step 6: Final answer
    x = 9,775.71

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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.