Home / 7,869.92-11,821.28-6,639.73

Finding the Fourth Proportional to 7,869.92, 11,821.28 and 6,639.73

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Solution

The fourth proportional to 7,869.92, 11,821.28 and 6,639.73 is: 9,973.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,869.92 : 11,821.28 = 6,639.73 : x
  2. Step 2: Convert to fraction form
    7,869.92/11,821.28 = 6,639.73/x
  3. Step 3: Cross multiply
    7,869.92x = 11,821.28 × 6,639.73
  4. Step 4: Simplify right side
    7,869.92x = 78,490,044.70
  5. Step 5: Solve for x
    x = 78,490,044.70/7,869.92
  6. Step 6: Final answer
    x = 9,973.43

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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.