Home / 15,142.28-20,895.57-8,427.78

Finding the Fourth Proportional to 15,142.28, 20,895.57 and 8,427.78

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Solution

The fourth proportional to 15,142.28, 20,895.57 and 8,427.78 is: 11,629.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,142.28 : 20,895.57 = 8,427.78 : x
  2. Step 2: Convert to fraction form
    15,142.28/20,895.57 = 8,427.78/x
  3. Step 3: Cross multiply
    15,142.28x = 20,895.57 × 8,427.78
  4. Step 4: Simplify right side
    15,142.28x = 176,103,266.93
  5. Step 5: Solve for x
    x = 176,103,266.93/15,142.28
  6. Step 6: Final answer
    x = 11,629.91

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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.