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Finding the Fourth Proportional to 8,811.18, 13,218.39 and 7,182.18

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Solution

The fourth proportional to 8,811.18, 13,218.39 and 7,182.18 is: 10,774.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.18 : 13,218.39 = 7,182.18 : x
  2. Step 2: Convert to fraction form
    8,811.18/13,218.39 = 7,182.18/x
  3. Step 3: Cross multiply
    8,811.18x = 13,218.39 × 7,182.18
  4. Step 4: Simplify right side
    8,811.18x = 94,936,856.29
  5. Step 5: Solve for x
    x = 94,936,856.29/8,811.18
  6. Step 6: Final answer
    x = 10,774.59

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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.