Home / 28,480.38-42,759.45-18,138.30

Finding the Fourth Proportional to 28,480.38, 42,759.45 and 18,138.30

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Solution

The fourth proportional to 28,480.38, 42,759.45 and 18,138.30 is: 27,232.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.38 : 42,759.45 = 18,138.30 : x
  2. Step 2: Convert to fraction form
    28,480.38/42,759.45 = 18,138.30/x
  3. Step 3: Cross multiply
    28,480.38x = 42,759.45 × 18,138.30
  4. Step 4: Simplify right side
    28,480.38x = 775,583,731.94
  5. Step 5: Solve for x
    x = 775,583,731.94/28,480.38
  6. Step 6: Final answer
    x = 27,232.21

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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.