Home / 10,938.80-16,402.20-5,379.92

Finding the Fourth Proportional to 10,938.80, 16,402.20 and 5,379.92

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Solution

The fourth proportional to 10,938.80, 16,402.20 and 5,379.92 is: 8,066.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,938.80 : 16,402.20 = 5,379.92 : x
  2. Step 2: Convert to fraction form
    10,938.80/16,402.20 = 5,379.92/x
  3. Step 3: Cross multiply
    10,938.80x = 16,402.20 × 5,379.92
  4. Step 4: Simplify right side
    10,938.80x = 88,242,523.82
  5. Step 5: Solve for x
    x = 88,242,523.82/10,938.80
  6. Step 6: Final answer
    x = 8,066.93

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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.