Home / 20,135.04-27,780.60-12,171.48

Finding the Fourth Proportional to 20,135.04, 27,780.60 and 12,171.48

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Solution

The fourth proportional to 20,135.04, 27,780.60 and 12,171.48 is: 16,793.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.04 : 27,780.60 = 12,171.48 : x
  2. Step 2: Convert to fraction form
    20,135.04/27,780.60 = 12,171.48/x
  3. Step 3: Cross multiply
    20,135.04x = 27,780.60 × 12,171.48
  4. Step 4: Simplify right side
    20,135.04x = 338,131,017.29
  5. Step 5: Solve for x
    x = 338,131,017.29/20,135.04
  6. Step 6: Final answer
    x = 16,793.16

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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.