Home / 13,612.13-20,418.20-4,378.13

Finding the Fourth Proportional to 13,612.13, 20,418.20 and 4,378.13

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Solution

The fourth proportional to 13,612.13, 20,418.20 and 4,378.13 is: 6,567.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.13 : 20,418.20 = 4,378.13 : x
  2. Step 2: Convert to fraction form
    13,612.13/20,418.20 = 4,378.13/x
  3. Step 3: Cross multiply
    13,612.13x = 20,418.20 × 4,378.13
  4. Step 4: Simplify right side
    13,612.13x = 89,393,409.98
  5. Step 5: Solve for x
    x = 89,393,409.98/13,612.13
  6. Step 6: Final answer
    x = 6,567.19

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Similar ratio
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1.5x scale

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.