Home / 28,180.60-42,271.32-13,391.04

Finding the Fourth Proportional to 28,180.60, 42,271.32 and 13,391.04

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Solution

The fourth proportional to 28,180.60, 42,271.32 and 13,391.04 is: 20,086.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.60 : 42,271.32 = 13,391.04 : x
  2. Step 2: Convert to fraction form
    28,180.60/42,271.32 = 13,391.04/x
  3. Step 3: Cross multiply
    28,180.60x = 42,271.32 × 13,391.04
  4. Step 4: Simplify right side
    28,180.60x = 566,056,936.97
  5. Step 5: Solve for x
    x = 566,056,936.97/28,180.60
  6. Step 6: Final answer
    x = 20,086.76

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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.