Home / 12,619.90-18,929.17-3,854.13

Finding the Fourth Proportional to 12,619.90, 18,929.17 and 3,854.13

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Solution

The fourth proportional to 12,619.90, 18,929.17 and 3,854.13 is: 5,780.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.90 : 18,929.17 = 3,854.13 : x
  2. Step 2: Convert to fraction form
    12,619.90/18,929.17 = 3,854.13/x
  3. Step 3: Cross multiply
    12,619.90x = 18,929.17 × 3,854.13
  4. Step 4: Simplify right side
    12,619.90x = 72,955,462.70
  5. Step 5: Solve for x
    x = 72,955,462.70/12,619.90
  6. Step 6: Final answer
    x = 5,780.99

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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.