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Finding the Fourth Proportional to 21,873.53, 30,177.92 and 12,311.88

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Solution

The fourth proportional to 21,873.53, 30,177.92 and 12,311.88 is: 16,986.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.53 : 30,177.92 = 12,311.88 : x
  2. Step 2: Convert to fraction form
    21,873.53/30,177.92 = 12,311.88/x
  3. Step 3: Cross multiply
    21,873.53x = 30,177.92 × 12,311.88
  4. Step 4: Simplify right side
    21,873.53x = 371,546,868.13
  5. Step 5: Solve for x
    x = 371,546,868.13/21,873.53
  6. Step 6: Final answer
    x = 16,986.15

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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.