Home / 6,939.09-10,407.69-2,781.50

Finding the Fourth Proportional to 6,939.09, 10,407.69 and 2,781.50

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Solution

The fourth proportional to 6,939.09, 10,407.69 and 2,781.50 is: 4,171.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,939.09 : 10,407.69 = 2,781.50 : x
  2. Step 2: Convert to fraction form
    6,939.09/10,407.69 = 2,781.50/x
  3. Step 3: Cross multiply
    6,939.09x = 10,407.69 × 2,781.50
  4. Step 4: Simplify right side
    6,939.09x = 28,948,937.70
  5. Step 5: Solve for x
    x = 28,948,937.70/6,939.09
  6. Step 6: Final answer
    x = 4,171.86

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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.