Home / 20,112.17-27,758.10-11,162.55

Finding the Fourth Proportional to 20,112.17, 27,758.10 and 11,162.55

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Solution

The fourth proportional to 20,112.17, 27,758.10 and 11,162.55 is: 15,406.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.17 : 27,758.10 = 11,162.55 : x
  2. Step 2: Convert to fraction form
    20,112.17/27,758.10 = 11,162.55/x
  3. Step 3: Cross multiply
    20,112.17x = 27,758.10 × 11,162.55
  4. Step 4: Simplify right side
    20,112.17x = 309,851,179.16
  5. Step 5: Solve for x
    x = 309,851,179.16/20,112.17
  6. Step 6: Final answer
    x = 15,406.16

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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.