Home / 20,981.30-28,954.26-11,549.88

Finding the Fourth Proportional to 20,981.30, 28,954.26 and 11,549.88

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Solution

The fourth proportional to 20,981.30, 28,954.26 and 11,549.88 is: 15,938.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.30 : 28,954.26 = 11,549.88 : x
  2. Step 2: Convert to fraction form
    20,981.30/28,954.26 = 11,549.88/x
  3. Step 3: Cross multiply
    20,981.30x = 28,954.26 × 11,549.88
  4. Step 4: Simplify right side
    20,981.30x = 334,418,228.49
  5. Step 5: Solve for x
    x = 334,418,228.49/20,981.30
  6. Step 6: Final answer
    x = 15,938.87

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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.