Home / 22,651.28-31,258.80-13,220.40

Finding the Fourth Proportional to 22,651.28, 31,258.80 and 13,220.40

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Solution

The fourth proportional to 22,651.28, 31,258.80 and 13,220.40 is: 18,244.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,651.28 : 31,258.80 = 13,220.40 : x
  2. Step 2: Convert to fraction form
    22,651.28/31,258.80 = 13,220.40/x
  3. Step 3: Cross multiply
    22,651.28x = 31,258.80 × 13,220.40
  4. Step 4: Simplify right side
    22,651.28x = 413,253,839.52
  5. Step 5: Solve for x
    x = 413,253,839.52/22,651.28
  6. Step 6: Final answer
    x = 18,244.17

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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.