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Finding the Fourth Proportional to 9,436.68, 12,992.88 and 8,561.88

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Solution

The fourth proportional to 9,436.68, 12,992.88 and 8,561.88 is: 11,788.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,436.68 : 12,992.88 = 8,561.88 : x
  2. Step 2: Convert to fraction form
    9,436.68/12,992.88 = 8,561.88/x
  3. Step 3: Cross multiply
    9,436.68x = 12,992.88 × 8,561.88
  4. Step 4: Simplify right side
    9,436.68x = 111,243,479.41
  5. Step 5: Solve for x
    x = 111,243,479.41/9,436.68
  6. Step 6: Final answer
    x = 11,788.41

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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.