Home / 7,115.61-9,818.98-4,131.66

Finding the Fourth Proportional to 7,115.61, 9,818.98 and 4,131.66

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Solution

The fourth proportional to 7,115.61, 9,818.98 and 4,131.66 is: 5,701.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.61 : 9,818.98 = 4,131.66 : x
  2. Step 2: Convert to fraction form
    7,115.61/9,818.98 = 4,131.66/x
  3. Step 3: Cross multiply
    7,115.61x = 9,818.98 × 4,131.66
  4. Step 4: Simplify right side
    7,115.61x = 40,568,686.91
  5. Step 5: Solve for x
    x = 40,568,686.91/7,115.61
  6. Step 6: Final answer
    x = 5,701.36

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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.