Home / 21,040.20-31,560.01-12,168.88

Finding the Fourth Proportional to 21,040.20, 31,560.01 and 12,168.88

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Solution

The fourth proportional to 21,040.20, 31,560.01 and 12,168.88 is: 18,253.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.20 : 31,560.01 = 12,168.88 : x
  2. Step 2: Convert to fraction form
    21,040.20/31,560.01 = 12,168.88/x
  3. Step 3: Cross multiply
    21,040.20x = 31,560.01 × 12,168.88
  4. Step 4: Simplify right side
    21,040.20x = 384,049,974.49
  5. Step 5: Solve for x
    x = 384,049,974.49/21,040.20
  6. Step 6: Final answer
    x = 18,253.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.