Home / 12,656.23-18,986.16-3,891.88

Finding the Fourth Proportional to 12,656.23, 18,986.16 and 3,891.88

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Solution

The fourth proportional to 12,656.23, 18,986.16 and 3,891.88 is: 5,838.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.23 : 18,986.16 = 3,891.88 : x
  2. Step 2: Convert to fraction form
    12,656.23/18,986.16 = 3,891.88/x
  3. Step 3: Cross multiply
    12,656.23x = 18,986.16 × 3,891.88
  4. Step 4: Simplify right side
    12,656.23x = 73,891,856.38
  5. Step 5: Solve for x
    x = 73,891,856.38/12,656.23
  6. Step 6: Final answer
    x = 5,838.38

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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.