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Finding the Fourth Proportional to 18,318.30, 27,477.45 and 10,542.30

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Solution

The fourth proportional to 18,318.30, 27,477.45 and 10,542.30 is: 15,813.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,318.30 : 27,477.45 = 10,542.30 : x
  2. Step 2: Convert to fraction form
    18,318.30/27,477.45 = 10,542.30/x
  3. Step 3: Cross multiply
    18,318.30x = 27,477.45 × 10,542.30
  4. Step 4: Simplify right side
    18,318.30x = 289,675,521.14
  5. Step 5: Solve for x
    x = 289,675,521.14/18,318.30
  6. Step 6: Final answer
    x = 15,813.45

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Similar ratio
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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.