Home / 10,939.80-16,385.40-5,739.60

Finding the Fourth Proportional to 10,939.80, 16,385.40 and 5,739.60

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Solution

The fourth proportional to 10,939.80, 16,385.40 and 5,739.60 is: 8,596.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.80 : 16,385.40 = 5,739.60 : x
  2. Step 2: Convert to fraction form
    10,939.80/16,385.40 = 5,739.60/x
  3. Step 3: Cross multiply
    10,939.80x = 16,385.40 × 5,739.60
  4. Step 4: Simplify right side
    10,939.80x = 94,045,641.84
  5. Step 5: Solve for x
    x = 94,045,641.84/10,939.80
  6. Step 6: Final answer
    x = 8,596.65

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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.