Home / 10,921.20-16,381.80-2,713.20

Finding the Fourth Proportional to 10,921.20, 16,381.80 and 2,713.20

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Solution

The fourth proportional to 10,921.20, 16,381.80 and 2,713.20 is: 4,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.20 : 16,381.80 = 2,713.20 : x
  2. Step 2: Convert to fraction form
    10,921.20/16,381.80 = 2,713.20/x
  3. Step 3: Cross multiply
    10,921.20x = 16,381.80 × 2,713.20
  4. Step 4: Simplify right side
    10,921.20x = 44,447,099.76
  5. Step 5: Solve for x
    x = 44,447,099.76/10,921.20
  6. Step 6: Final answer
    x = 4,069.80

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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.