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Finding the Fourth Proportional to 12,641.28, 18,950.88 and 6,393.12

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Solution

The fourth proportional to 12,641.28, 18,950.88 and 6,393.12 is: 9,584.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.28 : 18,950.88 = 6,393.12 : x
  2. Step 2: Convert to fraction form
    12,641.28/18,950.88 = 6,393.12/x
  3. Step 3: Cross multiply
    12,641.28x = 18,950.88 × 6,393.12
  4. Step 4: Simplify right side
    12,641.28x = 121,155,249.95
  5. Step 5: Solve for x
    x = 121,155,249.95/12,641.28
  6. Step 6: Final answer
    x = 9,584.10

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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.