Home / 20,719.20-31,103.10-20,573.40

Finding the Fourth Proportional to 20,719.20, 31,103.10 and 20,573.40

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Solution

The fourth proportional to 20,719.20, 31,103.10 and 20,573.40 is: 30,884.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.20 : 31,103.10 = 20,573.40 : x
  2. Step 2: Convert to fraction form
    20,719.20/31,103.10 = 20,573.40/x
  3. Step 3: Cross multiply
    20,719.20x = 31,103.10 × 20,573.40
  4. Step 4: Simplify right side
    20,719.20x = 639,896,517.54
  5. Step 5: Solve for x
    x = 639,896,517.54/20,719.20
  6. Step 6: Final answer
    x = 30,884.23

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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.