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Finding the Fourth Proportional to 8,685.33, 11,979.41 and 7,492.61

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Solution

The fourth proportional to 8,685.33, 11,979.41 and 7,492.61 is: 10,334.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.33 : 11,979.41 = 7,492.61 : x
  2. Step 2: Convert to fraction form
    8,685.33/11,979.41 = 7,492.61/x
  3. Step 3: Cross multiply
    8,685.33x = 11,979.41 × 7,492.61
  4. Step 4: Simplify right side
    8,685.33x = 89,756,949.80
  5. Step 5: Solve for x
    x = 89,756,949.80/8,685.33
  6. Step 6: Final answer
    x = 10,334.32

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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.