Home / 12,191.15-18,287.36-3,871.82

Finding the Fourth Proportional to 12,191.15, 18,287.36 and 3,871.82

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Solution

The fourth proportional to 12,191.15, 18,287.36 and 3,871.82 is: 5,807.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.15 : 18,287.36 = 3,871.82 : x
  2. Step 2: Convert to fraction form
    12,191.15/18,287.36 = 3,871.82/x
  3. Step 3: Cross multiply
    12,191.15x = 18,287.36 × 3,871.82
  4. Step 4: Simplify right side
    12,191.15x = 70,805,366.20
  5. Step 5: Solve for x
    x = 70,805,366.20/12,191.15
  6. Step 6: Final answer
    x = 5,807.93

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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.