Home / 20,981.25-28,954.62-11,549.79

Finding the Fourth Proportional to 20,981.25, 28,954.62 and 11,549.79

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Solution

The fourth proportional to 20,981.25, 28,954.62 and 11,549.79 is: 15,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.25 : 28,954.62 = 11,549.79 : x
  2. Step 2: Convert to fraction form
    20,981.25/28,954.62 = 11,549.79/x
  3. Step 3: Cross multiply
    20,981.25x = 28,954.62 × 11,549.79
  4. Step 4: Simplify right side
    20,981.25x = 334,419,780.53
  5. Step 5: Solve for x
    x = 334,419,780.53/20,981.25
  6. Step 6: Final answer
    x = 15,938.98

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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.