Home / 20,661.38-30,991.80-5,079.14

Finding the Fourth Proportional to 20,661.38, 30,991.80 and 5,079.14

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Solution

The fourth proportional to 20,661.38, 30,991.80 and 5,079.14 is: 7,618.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.38 : 30,991.80 = 5,079.14 : x
  2. Step 2: Convert to fraction form
    20,661.38/30,991.80 = 5,079.14/x
  3. Step 3: Cross multiply
    20,661.38x = 30,991.80 × 5,079.14
  4. Step 4: Simplify right side
    20,661.38x = 157,411,691.05
  5. Step 5: Solve for x
    x = 157,411,691.05/20,661.38
  6. Step 6: Final answer
    x = 7,618.64

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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.