Home / 22,715.28-31,355.64-13,286.88

Finding the Fourth Proportional to 22,715.28, 31,355.64 and 13,286.88

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Solution

The fourth proportional to 22,715.28, 31,355.64 and 13,286.88 is: 18,340.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,715.28 : 31,355.64 = 13,286.88 : x
  2. Step 2: Convert to fraction form
    22,715.28/31,355.64 = 13,286.88/x
  3. Step 3: Cross multiply
    22,715.28x = 31,355.64 × 13,286.88
  4. Step 4: Simplify right side
    22,715.28x = 416,618,626.00
  5. Step 5: Solve for x
    x = 416,618,626.00/22,715.28
  6. Step 6: Final answer
    x = 18,340.90

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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.