Home / 5,140.12-7,702.80-3,191.20

Finding the Fourth Proportional to 5,140.12, 7,702.80 and 3,191.20

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Solution

The fourth proportional to 5,140.12, 7,702.80 and 3,191.20 is: 4,782.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.12 : 7,702.80 = 3,191.20 : x
  2. Step 2: Convert to fraction form
    5,140.12/7,702.80 = 3,191.20/x
  3. Step 3: Cross multiply
    5,140.12x = 7,702.80 × 3,191.20
  4. Step 4: Simplify right side
    5,140.12x = 24,581,175.36
  5. Step 5: Solve for x
    x = 24,581,175.36/5,140.12
  6. Step 6: Final answer
    x = 4,782.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.