Home / 10,912.20-16,368.30-3,985.80

Finding the Fourth Proportional to 10,912.20, 16,368.30 and 3,985.80

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Solution

The fourth proportional to 10,912.20, 16,368.30 and 3,985.80 is: 5,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.20 : 16,368.30 = 3,985.80 : x
  2. Step 2: Convert to fraction form
    10,912.20/16,368.30 = 3,985.80/x
  3. Step 3: Cross multiply
    10,912.20x = 16,368.30 × 3,985.80
  4. Step 4: Simplify right side
    10,912.20x = 65,240,770.14
  5. Step 5: Solve for x
    x = 65,240,770.14/10,912.20
  6. Step 6: Final answer
    x = 5,978.70

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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.