Home / 12,479.81-18,720.33-3,714.80

Finding the Fourth Proportional to 12,479.81, 18,720.33 and 3,714.80

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Solution

The fourth proportional to 12,479.81, 18,720.33 and 3,714.80 is: 5,572.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.81 : 18,720.33 = 3,714.80 : x
  2. Step 2: Convert to fraction form
    12,479.81/18,720.33 = 3,714.80/x
  3. Step 3: Cross multiply
    12,479.81x = 18,720.33 × 3,714.80
  4. Step 4: Simplify right side
    12,479.81x = 69,542,328.68
  5. Step 5: Solve for x
    x = 69,542,328.68/12,479.81
  6. Step 6: Final answer
    x = 5,572.39

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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.