Home / 20,520.72-30,787.56-8,839.44

Finding the Fourth Proportional to 20,520.72, 30,787.56 and 8,839.44

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Solution

The fourth proportional to 20,520.72, 30,787.56 and 8,839.44 is: 13,261.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.72 : 30,787.56 = 8,839.44 : x
  2. Step 2: Convert to fraction form
    20,520.72/30,787.56 = 8,839.44/x
  3. Step 3: Cross multiply
    20,520.72x = 30,787.56 × 8,839.44
  4. Step 4: Simplify right side
    20,520.72x = 272,144,789.37
  5. Step 5: Solve for x
    x = 272,144,789.37/20,520.72
  6. Step 6: Final answer
    x = 13,261.95

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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.