Home / 7,131.90-9,839.91-4,147.02

Finding the Fourth Proportional to 7,131.90, 9,839.91 and 4,147.02

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Solution

The fourth proportional to 7,131.90, 9,839.91 and 4,147.02 is: 5,721.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.90 : 9,839.91 = 4,147.02 : x
  2. Step 2: Convert to fraction form
    7,131.90/9,839.91 = 4,147.02/x
  3. Step 3: Cross multiply
    7,131.90x = 9,839.91 × 4,147.02
  4. Step 4: Simplify right side
    7,131.90x = 40,806,303.57
  5. Step 5: Solve for x
    x = 40,806,303.57/7,131.90
  6. Step 6: Final answer
    x = 5,721.66

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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.