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Finding the Fourth Proportional to 7,768.89, 10,775.99 and 7,488.68

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Solution

The fourth proportional to 7,768.89, 10,775.99 and 7,488.68 is: 10,387.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.89 : 10,775.99 = 7,488.68 : x
  2. Step 2: Convert to fraction form
    7,768.89/10,775.99 = 7,488.68/x
  3. Step 3: Cross multiply
    7,768.89x = 10,775.99 × 7,488.68
  4. Step 4: Simplify right side
    7,768.89x = 80,697,940.79
  5. Step 5: Solve for x
    x = 80,697,940.79/7,768.89
  6. Step 6: Final answer
    x = 10,387.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.