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Finding the Fourth Proportional to 18,436.79, 27,655.17 and 4,585.79

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Solution

The fourth proportional to 18,436.79, 27,655.17 and 4,585.79 is: 6,878.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,436.79 : 27,655.17 = 4,585.79 : x
  2. Step 2: Convert to fraction form
    18,436.79/27,655.17 = 4,585.79/x
  3. Step 3: Cross multiply
    18,436.79x = 27,655.17 × 4,585.79
  4. Step 4: Simplify right side
    18,436.79x = 126,820,663.76
  5. Step 5: Solve for x
    x = 126,820,663.76/18,436.79
  6. Step 6: Final answer
    x = 6,878.68

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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.