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Finding the Fourth Proportional to 12,881.39, 17,776.17 and 7,216.65

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Solution

The fourth proportional to 12,881.39, 17,776.17 and 7,216.65 is: 9,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.39 : 17,776.17 = 7,216.65 : x
  2. Step 2: Convert to fraction form
    12,881.39/17,776.17 = 7,216.65/x
  3. Step 3: Cross multiply
    12,881.39x = 17,776.17 × 7,216.65
  4. Step 4: Simplify right side
    12,881.39x = 128,284,397.23
  5. Step 5: Solve for x
    x = 128,284,397.23/12,881.39
  6. Step 6: Final answer
    x = 9,958.90

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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.