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Finding the Fourth Proportional to 7,799.76, 11,701.68 and 2,605.68

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Solution

The fourth proportional to 7,799.76, 11,701.68 and 2,605.68 is: 3,909.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,799.76 : 11,701.68 = 2,605.68 : x
  2. Step 2: Convert to fraction form
    7,799.76/11,701.68 = 2,605.68/x
  3. Step 3: Cross multiply
    7,799.76x = 11,701.68 × 2,605.68
  4. Step 4: Simplify right side
    7,799.76x = 30,490,833.54
  5. Step 5: Solve for x
    x = 30,490,833.54/7,799.76
  6. Step 6: Final answer
    x = 3,909.20

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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.