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Finding the Fourth Proportional to 7,799.70, 11,700.15 and 2,605.58

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Solution

The fourth proportional to 7,799.70, 11,700.15 and 2,605.58 is: 3,908.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,799.70 : 11,700.15 = 2,605.58 : x
  2. Step 2: Convert to fraction form
    7,799.70/11,700.15 = 2,605.58/x
  3. Step 3: Cross multiply
    7,799.70x = 11,700.15 × 2,605.58
  4. Step 4: Simplify right side
    7,799.70x = 30,485,676.84
  5. Step 5: Solve for x
    x = 30,485,676.84/7,799.70
  6. Step 6: Final answer
    x = 3,908.57

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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.