Home / 10,920.80-16,379.40-4,346.56

Finding the Fourth Proportional to 10,920.80, 16,379.40 and 4,346.56

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Solution

The fourth proportional to 10,920.80, 16,379.40 and 4,346.56 is: 6,519.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.80 : 16,379.40 = 4,346.56 : x
  2. Step 2: Convert to fraction form
    10,920.80/16,379.40 = 4,346.56/x
  3. Step 3: Cross multiply
    10,920.80x = 16,379.40 × 4,346.56
  4. Step 4: Simplify right side
    10,920.80x = 71,194,044.86
  5. Step 5: Solve for x
    x = 71,194,044.86/10,920.80
  6. Step 6: Final answer
    x = 6,519.12

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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.