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Finding the Fourth Proportional to 38,471.40, 57,714.90 and 21,839.40

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Solution

The fourth proportional to 38,471.40, 57,714.90 and 21,839.40 is: 32,763.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,471.40 : 57,714.90 = 21,839.40 : x
  2. Step 2: Convert to fraction form
    38,471.40/57,714.90 = 21,839.40/x
  3. Step 3: Cross multiply
    38,471.40x = 57,714.90 × 21,839.40
  4. Step 4: Simplify right side
    38,471.40x = 1,260,458,787.06
  5. Step 5: Solve for x
    x = 1,260,458,787.06/38,471.40
  6. Step 6: Final answer
    x = 32,763.53

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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.