Home / 7,780.76-11,672.40-3,100.76

Finding the Fourth Proportional to 7,780.76, 11,672.40 and 3,100.76

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Solution

The fourth proportional to 7,780.76, 11,672.40 and 3,100.76 is: 4,651.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.76 : 11,672.40 = 3,100.76 : x
  2. Step 2: Convert to fraction form
    7,780.76/11,672.40 = 3,100.76/x
  3. Step 3: Cross multiply
    7,780.76x = 11,672.40 × 3,100.76
  4. Step 4: Simplify right side
    7,780.76x = 36,193,252.66
  5. Step 5: Solve for x
    x = 36,193,252.66/7,780.76
  6. Step 6: Final answer
    x = 4,651.64

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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.