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Finding the Fourth Proportional to 7,329.78, 10,987.94 and 2,648.68

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Solution

The fourth proportional to 7,329.78, 10,987.94 and 2,648.68 is: 3,970.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,329.78 : 10,987.94 = 2,648.68 : x
  2. Step 2: Convert to fraction form
    7,329.78/10,987.94 = 2,648.68/x
  3. Step 3: Cross multiply
    7,329.78x = 10,987.94 × 2,648.68
  4. Step 4: Simplify right side
    7,329.78x = 29,103,536.92
  5. Step 5: Solve for x
    x = 29,103,536.92/7,329.78
  6. Step 6: Final answer
    x = 3,970.59

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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.