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Finding the Fourth Proportional to 18,448.40, 27,687.42 and 9,688.52

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Solution

The fourth proportional to 18,448.40, 27,687.42 and 9,688.52 is: 14,540.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,448.40 : 27,687.42 = 9,688.52 : x
  2. Step 2: Convert to fraction form
    18,448.40/27,687.42 = 9,688.52/x
  3. Step 3: Cross multiply
    18,448.40x = 27,687.42 × 9,688.52
  4. Step 4: Simplify right side
    18,448.40x = 268,250,122.42
  5. Step 5: Solve for x
    x = 268,250,122.42/18,448.40
  6. Step 6: Final answer
    x = 14,540.56

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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.