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Finding the Fourth Proportional to 8,613.95, 12,918.18 and 2,769.19

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Solution

The fourth proportional to 8,613.95, 12,918.18 and 2,769.19 is: 4,152.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.95 : 12,918.18 = 2,769.19 : x
  2. Step 2: Convert to fraction form
    8,613.95/12,918.18 = 2,769.19/x
  3. Step 3: Cross multiply
    8,613.95x = 12,918.18 × 2,769.19
  4. Step 4: Simplify right side
    8,613.95x = 35,772,872.96
  5. Step 5: Solve for x
    x = 35,772,872.96/8,613.95
  6. Step 6: Final answer
    x = 4,152.90

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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.