Home / 20,478.12-30,717.20-5,687.07

Finding the Fourth Proportional to 20,478.12, 30,717.20 and 5,687.07

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Solution

The fourth proportional to 20,478.12, 30,717.20 and 5,687.07 is: 8,530.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.12 : 30,717.20 = 5,687.07 : x
  2. Step 2: Convert to fraction form
    20,478.12/30,717.20 = 5,687.07/x
  3. Step 3: Cross multiply
    20,478.12x = 30,717.20 × 5,687.07
  4. Step 4: Simplify right side
    20,478.12x = 174,690,866.60
  5. Step 5: Solve for x
    x = 174,690,866.60/20,478.12
  6. Step 6: Final answer
    x = 8,530.61

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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.