Home / 12,657.22-18,984.16-3,891.40

Finding the Fourth Proportional to 12,657.22, 18,984.16 and 3,891.40

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Solution

The fourth proportional to 12,657.22, 18,984.16 and 3,891.40 is: 5,836.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.22 : 18,984.16 = 3,891.40 : x
  2. Step 2: Convert to fraction form
    12,657.22/18,984.16 = 3,891.40/x
  3. Step 3: Cross multiply
    12,657.22x = 18,984.16 × 3,891.40
  4. Step 4: Simplify right side
    12,657.22x = 73,874,960.22
  5. Step 5: Solve for x
    x = 73,874,960.22/12,657.22
  6. Step 6: Final answer
    x = 5,836.59

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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.