Home / 30,517.92-42,115.41-21,581.46

Finding the Fourth Proportional to 30,517.92, 42,115.41 and 21,581.46

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Solution

The fourth proportional to 30,517.92, 42,115.41 and 21,581.46 is: 29,782.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,517.92 : 42,115.41 = 21,581.46 : x
  2. Step 2: Convert to fraction form
    30,517.92/42,115.41 = 21,581.46/x
  3. Step 3: Cross multiply
    30,517.92x = 42,115.41 × 21,581.46
  4. Step 4: Simplify right side
    30,517.92x = 908,912,036.30
  5. Step 5: Solve for x
    x = 908,912,036.30/30,517.92
  6. Step 6: Final answer
    x = 29,782.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.