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Finding the Fourth Proportional to 12,881.12, 17,775.92 and 7,292.64

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Solution

The fourth proportional to 12,881.12, 17,775.92 and 7,292.64 is: 10,063.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.12 : 17,775.92 = 7,292.64 : x
  2. Step 2: Convert to fraction form
    12,881.12/17,775.92 = 7,292.64/x
  3. Step 3: Cross multiply
    12,881.12x = 17,775.92 × 7,292.64
  4. Step 4: Simplify right side
    12,881.12x = 129,633,385.23
  5. Step 5: Solve for x
    x = 129,633,385.23/12,881.12
  6. Step 6: Final answer
    x = 10,063.83

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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.