Home / 28,142.38-42,204.75-9,418.04

Finding the Fourth Proportional to 28,142.38, 42,204.75 and 9,418.04

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Solution

The fourth proportional to 28,142.38, 42,204.75 and 9,418.04 is: 14,124.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.38 : 42,204.75 = 9,418.04 : x
  2. Step 2: Convert to fraction form
    28,142.38/42,204.75 = 9,418.04/x
  3. Step 3: Cross multiply
    28,142.38x = 42,204.75 × 9,418.04
  4. Step 4: Simplify right side
    28,142.38x = 397,485,812.67
  5. Step 5: Solve for x
    x = 397,485,812.67/28,142.38
  6. Step 6: Final answer
    x = 14,124.10

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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.