Home / 13,678.12-20,517.24-3,818.08

Finding the Fourth Proportional to 13,678.12, 20,517.24 and 3,818.08

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Solution

The fourth proportional to 13,678.12, 20,517.24 and 3,818.08 is: 5,727.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.12 : 20,517.24 = 3,818.08 : x
  2. Step 2: Convert to fraction form
    13,678.12/20,517.24 = 3,818.08/x
  3. Step 3: Cross multiply
    13,678.12x = 20,517.24 × 3,818.08
  4. Step 4: Simplify right side
    13,678.12x = 78,336,463.70
  5. Step 5: Solve for x
    x = 78,336,463.70/13,678.12
  6. Step 6: Final answer
    x = 5,727.14

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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.