Home / 7,115.20-9,818.76-3,971.92

Finding the Fourth Proportional to 7,115.20, 9,818.76 and 3,971.92

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Solution

The fourth proportional to 7,115.20, 9,818.76 and 3,971.92 is: 5,481.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.20 : 9,818.76 = 3,971.92 : x
  2. Step 2: Convert to fraction form
    7,115.20/9,818.76 = 3,971.92/x
  3. Step 3: Cross multiply
    7,115.20x = 9,818.76 × 3,971.92
  4. Step 4: Simplify right side
    7,115.20x = 38,999,329.22
  5. Step 5: Solve for x
    x = 38,999,329.22/7,115.20
  6. Step 6: Final answer
    x = 5,481.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.