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Finding the Fourth Proportional to 7,758.59, 11,550.12 and 7,712.45

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Solution

The fourth proportional to 7,758.59, 11,550.12 and 7,712.45 is: 11,481.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,758.59 : 11,550.12 = 7,712.45 : x
  2. Step 2: Convert to fraction form
    7,758.59/11,550.12 = 7,712.45/x
  3. Step 3: Cross multiply
    7,758.59x = 11,550.12 × 7,712.45
  4. Step 4: Simplify right side
    7,758.59x = 89,079,751.87
  5. Step 5: Solve for x
    x = 89,079,751.87/7,758.59
  6. Step 6: Final answer
    x = 11,481.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.