Home / 12,478.85-18,712.03-4,155.96

Finding the Fourth Proportional to 12,478.85, 18,712.03 and 4,155.96

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Solution

The fourth proportional to 12,478.85, 18,712.03 and 4,155.96 is: 6,231.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.85 : 18,712.03 = 4,155.96 : x
  2. Step 2: Convert to fraction form
    12,478.85/18,712.03 = 4,155.96/x
  3. Step 3: Cross multiply
    12,478.85x = 18,712.03 × 4,155.96
  4. Step 4: Simplify right side
    12,478.85x = 77,766,448.20
  5. Step 5: Solve for x
    x = 77,766,448.20/12,478.85
  6. Step 6: Final answer
    x = 6,231.86

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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.