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Finding the Fourth Proportional to 18,387, 27,496.40 and 13,710.20

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Solution

The fourth proportional to 18,387, 27,496.40 and 13,710.20 is: 20,502.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387 : 27,496.40 = 13,710.20 : x
  2. Step 2: Convert to fraction form
    18,387/27,496.40 = 13,710.20/x
  3. Step 3: Cross multiply
    18,387x = 27,496.40 × 13,710.20
  4. Step 4: Simplify right side
    18,387x = 376,980,937.25
  5. Step 5: Solve for x
    x = 376,980,937.25/18,387
  6. Step 6: Final answer
    x = 20,502.58

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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.