Home / 20,321.80-28,034.72-13,154.02

Finding the Fourth Proportional to 20,321.80, 28,034.72 and 13,154.02

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Solution

The fourth proportional to 20,321.80, 28,034.72 and 13,154.02 is: 18,146.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.80 : 28,034.72 = 13,154.02 : x
  2. Step 2: Convert to fraction form
    20,321.80/28,034.72 = 13,154.02/x
  3. Step 3: Cross multiply
    20,321.80x = 28,034.72 × 13,154.02
  4. Step 4: Simplify right side
    20,321.80x = 368,769,181.05
  5. Step 5: Solve for x
    x = 368,769,181.05/20,321.80
  6. Step 6: Final answer
    x = 18,146.48

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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.