Home / 22,721.28-31,355.60-13,288

Finding the Fourth Proportional to 22,721.28, 31,355.60 and 13,288

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Solution

The fourth proportional to 22,721.28, 31,355.60 and 13,288 is: 18,337.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,721.28 : 31,355.60 = 13,288 : x
  2. Step 2: Convert to fraction form
    22,721.28/31,355.60 = 13,288/x
  3. Step 3: Cross multiply
    22,721.28x = 31,355.60 × 13,288
  4. Step 4: Simplify right side
    22,721.28x = 416,653,212.80
  5. Step 5: Solve for x
    x = 416,653,212.80/22,721.28
  6. Step 6: Final answer
    x = 18,337.58

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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.