Home / 20,095.38-27,731.46-11,142.78

Finding the Fourth Proportional to 20,095.38, 27,731.46 and 11,142.78

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Solution

The fourth proportional to 20,095.38, 27,731.46 and 11,142.78 is: 15,376.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,095.38 : 27,731.46 = 11,142.78 : x
  2. Step 2: Convert to fraction form
    20,095.38/27,731.46 = 11,142.78/x
  3. Step 3: Cross multiply
    20,095.38x = 27,731.46 × 11,142.78
  4. Step 4: Simplify right side
    20,095.38x = 309,005,557.86
  5. Step 5: Solve for x
    x = 309,005,557.86/20,095.38
  6. Step 6: Final answer
    x = 15,376.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.