Home / 13,785.12-20,680.92-3,924.18

Finding the Fourth Proportional to 13,785.12, 20,680.92 and 3,924.18

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Solution

The fourth proportional to 13,785.12, 20,680.92 and 3,924.18 is: 5,887.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.12 : 20,680.92 = 3,924.18 : x
  2. Step 2: Convert to fraction form
    13,785.12/20,680.92 = 3,924.18/x
  3. Step 3: Cross multiply
    13,785.12x = 20,680.92 × 3,924.18
  4. Step 4: Simplify right side
    13,785.12x = 81,155,652.65
  5. Step 5: Solve for x
    x = 81,155,652.65/13,785.12
  6. Step 6: Final answer
    x = 5,887.19

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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.