Home / 7,854.20-11,780.90-2,660.12

Finding the Fourth Proportional to 7,854.20, 11,780.90 and 2,660.12

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Solution

The fourth proportional to 7,854.20, 11,780.90 and 2,660.12 is: 3,990.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,854.20 : 11,780.90 = 2,660.12 : x
  2. Step 2: Convert to fraction form
    7,854.20/11,780.90 = 2,660.12/x
  3. Step 3: Cross multiply
    7,854.20x = 11,780.90 × 2,660.12
  4. Step 4: Simplify right side
    7,854.20x = 31,338,607.71
  5. Step 5: Solve for x
    x = 31,338,607.71/7,854.20
  6. Step 6: Final answer
    x = 3,990.04

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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.