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Finding the Fourth Proportional to 18,280.28, 27,438.50 and 13,021.16

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Solution

The fourth proportional to 18,280.28, 27,438.50 and 13,021.16 is: 19,544.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,280.28 : 27,438.50 = 13,021.16 : x
  2. Step 2: Convert to fraction form
    18,280.28/27,438.50 = 13,021.16/x
  3. Step 3: Cross multiply
    18,280.28x = 27,438.50 × 13,021.16
  4. Step 4: Simplify right side
    18,280.28x = 357,280,920.78
  5. Step 5: Solve for x
    x = 357,280,920.78/18,280.28
  6. Step 6: Final answer
    x = 19,544.61

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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.