Home / 20,079.12-30,120.16-5,287.94

Finding the Fourth Proportional to 20,079.12, 30,120.16 and 5,287.94

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Solution

The fourth proportional to 20,079.12, 30,120.16 and 5,287.94 is: 7,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.12 : 30,120.16 = 5,287.94 : x
  2. Step 2: Convert to fraction form
    20,079.12/30,120.16 = 5,287.94/x
  3. Step 3: Cross multiply
    20,079.12x = 30,120.16 × 5,287.94
  4. Step 4: Simplify right side
    20,079.12x = 159,273,598.87
  5. Step 5: Solve for x
    x = 159,273,598.87/20,079.12
  6. Step 6: Final answer
    x = 7,932.30

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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.