Home / 20,079.28-30,120.66-5,288.08

Finding the Fourth Proportional to 20,079.28, 30,120.66 and 5,288.08

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Solution

The fourth proportional to 20,079.28, 30,120.66 and 5,288.08 is: 7,932.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.28 : 30,120.66 = 5,288.08 : x
  2. Step 2: Convert to fraction form
    20,079.28/30,120.66 = 5,288.08/x
  3. Step 3: Cross multiply
    20,079.28x = 30,120.66 × 5,288.08
  4. Step 4: Simplify right side
    20,079.28x = 159,280,459.73
  5. Step 5: Solve for x
    x = 159,280,459.73/20,079.28
  6. Step 6: Final answer
    x = 7,932.58

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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.