Home / 7,020.20-9,687.78-3,876.41

Finding the Fourth Proportional to 7,020.20, 9,687.78 and 3,876.41

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Solution

The fourth proportional to 7,020.20, 9,687.78 and 3,876.41 is: 5,349.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020.20 : 9,687.78 = 3,876.41 : x
  2. Step 2: Convert to fraction form
    7,020.20/9,687.78 = 3,876.41/x
  3. Step 3: Cross multiply
    7,020.20x = 9,687.78 × 3,876.41
  4. Step 4: Simplify right side
    7,020.20x = 37,553,758.83
  5. Step 5: Solve for x
    x = 37,553,758.83/7,020.20
  6. Step 6: Final answer
    x = 5,349.39

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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.