Home / 20,164.40-27,821.04-13,785.65

Finding the Fourth Proportional to 20,164.40, 27,821.04 and 13,785.65

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Solution

The fourth proportional to 20,164.40, 27,821.04 and 13,785.65 is: 19,020.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,164.40 : 27,821.04 = 13,785.65 : x
  2. Step 2: Convert to fraction form
    20,164.40/27,821.04 = 13,785.65/x
  3. Step 3: Cross multiply
    20,164.40x = 27,821.04 × 13,785.65
  4. Step 4: Simplify right side
    20,164.40x = 383,531,120.08
  5. Step 5: Solve for x
    x = 383,531,120.08/20,164.40
  6. Step 6: Final answer
    x = 19,020.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.