Home / 12,579.03-18,869.36-4,257.90

Finding the Fourth Proportional to 12,579.03, 18,869.36 and 4,257.90

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Solution

The fourth proportional to 12,579.03, 18,869.36 and 4,257.90 is: 6,387.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.03 : 18,869.36 = 4,257.90 : x
  2. Step 2: Convert to fraction form
    12,579.03/18,869.36 = 4,257.90/x
  3. Step 3: Cross multiply
    12,579.03x = 18,869.36 × 4,257.90
  4. Step 4: Simplify right side
    12,579.03x = 80,343,826.65
  5. Step 5: Solve for x
    x = 80,343,826.65/12,579.03
  6. Step 6: Final answer
    x = 6,387.12

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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.