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Finding the Fourth Proportional to 18,605.28, 27,875.42 and 15,505.21

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Solution

The fourth proportional to 18,605.28, 27,875.42 and 15,505.21 is: 23,230.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.28 : 27,875.42 = 15,505.21 : x
  2. Step 2: Convert to fraction form
    18,605.28/27,875.42 = 15,505.21/x
  3. Step 3: Cross multiply
    18,605.28x = 27,875.42 × 15,505.21
  4. Step 4: Simplify right side
    18,605.28x = 432,214,240.94
  5. Step 5: Solve for x
    x = 432,214,240.94/18,605.28
  6. Step 6: Final answer
    x = 23,230.73

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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.