Home / 4,315.20-6,454.80-3,930.72

Finding the Fourth Proportional to 4,315.20, 6,454.80 and 3,930.72

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Solution

The fourth proportional to 4,315.20, 6,454.80 and 3,930.72 is: 5,879.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,315.20 : 6,454.80 = 3,930.72 : x
  2. Step 2: Convert to fraction form
    4,315.20/6,454.80 = 3,930.72/x
  3. Step 3: Cross multiply
    4,315.20x = 6,454.80 × 3,930.72
  4. Step 4: Simplify right side
    4,315.20x = 25,372,011.46
  5. Step 5: Solve for x
    x = 25,372,011.46/4,315.20
  6. Step 6: Final answer
    x = 5,879.68

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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.