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Finding the Fourth Proportional to 8,372.40, 11,519.88 and 7,249.92

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Solution

The fourth proportional to 8,372.40, 11,519.88 and 7,249.92 is: 9,975.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,372.40 : 11,519.88 = 7,249.92 : x
  2. Step 2: Convert to fraction form
    8,372.40/11,519.88 = 7,249.92/x
  3. Step 3: Cross multiply
    8,372.40x = 11,519.88 × 7,249.92
  4. Step 4: Simplify right side
    8,372.40x = 83,518,208.41
  5. Step 5: Solve for x
    x = 83,518,208.41/8,372.40
  6. Step 6: Final answer
    x = 9,975.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.