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Finding the Fourth Proportional to 12,988.46, 17,922.99 and 7,324.61

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Solution

The fourth proportional to 12,988.46, 17,922.99 and 7,324.61 is: 10,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.46 : 17,922.99 = 7,324.61 : x
  2. Step 2: Convert to fraction form
    12,988.46/17,922.99 = 7,324.61/x
  3. Step 3: Cross multiply
    12,988.46x = 17,922.99 × 7,324.61
  4. Step 4: Simplify right side
    12,988.46x = 131,278,822.17
  5. Step 5: Solve for x
    x = 131,278,822.17/12,988.46
  6. Step 6: Final answer
    x = 10,107.35

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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.