Home / 15,902.79-21,949.11-11,121.45

Finding the Fourth Proportional to 15,902.79, 21,949.11 and 11,121.45

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Solution

The fourth proportional to 15,902.79, 21,949.11 and 11,121.45 is: 15,349.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,902.79 : 21,949.11 = 11,121.45 : x
  2. Step 2: Convert to fraction form
    15,902.79/21,949.11 = 11,121.45/x
  3. Step 3: Cross multiply
    15,902.79x = 21,949.11 × 11,121.45
  4. Step 4: Simplify right side
    15,902.79x = 244,105,929.41
  5. Step 5: Solve for x
    x = 244,105,929.41/15,902.79
  6. Step 6: Final answer
    x = 15,349.88

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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.