Home / 7,787.80-10,747.38-4,251.21

Finding the Fourth Proportional to 7,787.80, 10,747.38 and 4,251.21

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Solution

The fourth proportional to 7,787.80, 10,747.38 and 4,251.21 is: 5,866.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,787.80 : 10,747.38 = 4,251.21 : x
  2. Step 2: Convert to fraction form
    7,787.80/10,747.38 = 4,251.21/x
  3. Step 3: Cross multiply
    7,787.80x = 10,747.38 × 4,251.21
  4. Step 4: Simplify right side
    7,787.80x = 45,689,369.33
  5. Step 5: Solve for x
    x = 45,689,369.33/7,787.80
  6. Step 6: Final answer
    x = 5,866.79

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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.