Home / 7,131.15-9,841.19-3,987.63

Finding the Fourth Proportional to 7,131.15, 9,841.19 and 3,987.63

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Solution

The fourth proportional to 7,131.15, 9,841.19 and 3,987.63 is: 5,503.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.15 : 9,841.19 = 3,987.63 : x
  2. Step 2: Convert to fraction form
    7,131.15/9,841.19 = 3,987.63/x
  3. Step 3: Cross multiply
    7,131.15x = 9,841.19 × 3,987.63
  4. Step 4: Simplify right side
    7,131.15x = 39,243,004.54
  5. Step 5: Solve for x
    x = 39,243,004.54/7,131.15
  6. Step 6: Final answer
    x = 5,503.04

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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.