Home / 28,153.62-42,257.43-20,736.90

Finding the Fourth Proportional to 28,153.62, 42,257.43 and 20,736.90

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Solution

The fourth proportional to 28,153.62, 42,257.43 and 20,736.90 is: 31,125.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,153.62 : 42,257.43 = 20,736.90 : x
  2. Step 2: Convert to fraction form
    28,153.62/42,257.43 = 20,736.90/x
  3. Step 3: Cross multiply
    28,153.62x = 42,257.43 × 20,736.90
  4. Step 4: Simplify right side
    28,153.62x = 876,288,100.17
  5. Step 5: Solve for x
    x = 876,288,100.17/28,153.62
  6. Step 6: Final answer
    x = 31,125.24

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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.