Home / 20,711.40-31,067.10-5,921.20

Finding the Fourth Proportional to 20,711.40, 31,067.10 and 5,921.20

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Solution

The fourth proportional to 20,711.40, 31,067.10 and 5,921.20 is: 8,881.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.40 : 31,067.10 = 5,921.20 : x
  2. Step 2: Convert to fraction form
    20,711.40/31,067.10 = 5,921.20/x
  3. Step 3: Cross multiply
    20,711.40x = 31,067.10 × 5,921.20
  4. Step 4: Simplify right side
    20,711.40x = 183,954,512.52
  5. Step 5: Solve for x
    x = 183,954,512.52/20,711.40
  6. Step 6: Final answer
    x = 8,881.80

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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.