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Finding the Fourth Proportional to 18,417.90, 27,553.95 and 15,979.80

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Solution

The fourth proportional to 18,417.90, 27,553.95 and 15,979.80 is: 23,906.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,417.90 : 27,553.95 = 15,979.80 : x
  2. Step 2: Convert to fraction form
    18,417.90/27,553.95 = 15,979.80/x
  3. Step 3: Cross multiply
    18,417.90x = 27,553.95 × 15,979.80
  4. Step 4: Simplify right side
    18,417.90x = 440,306,610.21
  5. Step 5: Solve for x
    x = 440,306,610.21/18,417.90
  6. Step 6: Final answer
    x = 23,906.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.