Home / 10,520.80-15,778.46-3,123.58

Finding the Fourth Proportional to 10,520.80, 15,778.46 and 3,123.58

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Solution

The fourth proportional to 10,520.80, 15,778.46 and 3,123.58 is: 4,684.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.80 : 15,778.46 = 3,123.58 : x
  2. Step 2: Convert to fraction form
    10,520.80/15,778.46 = 3,123.58/x
  3. Step 3: Cross multiply
    10,520.80x = 15,778.46 × 3,123.58
  4. Step 4: Simplify right side
    10,520.80x = 49,285,282.09
  5. Step 5: Solve for x
    x = 49,285,282.09/10,520.80
  6. Step 6: Final answer
    x = 4,684.56

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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.