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Finding the Fourth Proportional to 22,011.20, 32,959.20 and 20,974.40

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Solution

The fourth proportional to 22,011.20, 32,959.20 and 20,974.40 is: 31,406.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,011.20 : 32,959.20 = 20,974.40 : x
  2. Step 2: Convert to fraction form
    22,011.20/32,959.20 = 20,974.40/x
  3. Step 3: Cross multiply
    22,011.20x = 32,959.20 × 20,974.40
  4. Step 4: Simplify right side
    22,011.20x = 691,299,444.48
  5. Step 5: Solve for x
    x = 691,299,444.48/22,011.20
  6. Step 6: Final answer
    x = 31,406.71

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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.