Home / 8,320.12-12,470.58-3,120.76

Finding the Fourth Proportional to 8,320.12, 12,470.58 and 3,120.76

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Solution

The fourth proportional to 8,320.12, 12,470.58 and 3,120.76 is: 4,677.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.12 : 12,470.58 = 3,120.76 : x
  2. Step 2: Convert to fraction form
    8,320.12/12,470.58 = 3,120.76/x
  3. Step 3: Cross multiply
    8,320.12x = 12,470.58 × 3,120.76
  4. Step 4: Simplify right side
    8,320.12x = 38,917,687.24
  5. Step 5: Solve for x
    x = 38,917,687.24/8,320.12
  6. Step 6: Final answer
    x = 4,677.54

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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.