Home / 10,939.80-16,403.70-5,380.92

Finding the Fourth Proportional to 10,939.80, 16,403.70 and 5,380.92

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Solution

The fourth proportional to 10,939.80, 16,403.70 and 5,380.92 is: 8,068.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.80 : 16,403.70 = 5,380.92 : x
  2. Step 2: Convert to fraction form
    10,939.80/16,403.70 = 5,380.92/x
  3. Step 3: Cross multiply
    10,939.80x = 16,403.70 × 5,380.92
  4. Step 4: Simplify right side
    10,939.80x = 88,266,997.40
  5. Step 5: Solve for x
    x = 88,266,997.40/10,939.80
  6. Step 6: Final answer
    x = 8,068.43

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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.