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Finding the Fourth Proportional to 19,712.61, 27,213.17 and 12,549.65

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Solution

The fourth proportional to 19,712.61, 27,213.17 and 12,549.65 is: 17,324.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,712.61 : 27,213.17 = 12,549.65 : x
  2. Step 2: Convert to fraction form
    19,712.61/27,213.17 = 12,549.65/x
  3. Step 3: Cross multiply
    19,712.61x = 27,213.17 × 12,549.65
  4. Step 4: Simplify right side
    19,712.61x = 341,515,560.08
  5. Step 5: Solve for x
    x = 341,515,560.08/19,712.61
  6. Step 6: Final answer
    x = 17,324.73

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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.