Home / 7,131.38-9,841.31-3,987.58

Finding the Fourth Proportional to 7,131.38, 9,841.31 and 3,987.58

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Solution

The fourth proportional to 7,131.38, 9,841.31 and 3,987.58 is: 5,502.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.38 : 9,841.31 = 3,987.58 : x
  2. Step 2: Convert to fraction form
    7,131.38/9,841.31 = 3,987.58/x
  3. Step 3: Cross multiply
    7,131.38x = 9,841.31 × 3,987.58
  4. Step 4: Simplify right side
    7,131.38x = 39,242,941.79
  5. Step 5: Solve for x
    x = 39,242,941.79/7,131.38
  6. Step 6: Final answer
    x = 5,502.85

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Double scale
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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.