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Finding the Fourth Proportional to 18,409.20, 27,613.80 and 8,567.70

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Solution

The fourth proportional to 18,409.20, 27,613.80 and 8,567.70 is: 12,851.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409.20 : 27,613.80 = 8,567.70 : x
  2. Step 2: Convert to fraction form
    18,409.20/27,613.80 = 8,567.70/x
  3. Step 3: Cross multiply
    18,409.20x = 27,613.80 × 8,567.70
  4. Step 4: Simplify right side
    18,409.20x = 236,586,754.26
  5. Step 5: Solve for x
    x = 236,586,754.26/18,409.20
  6. Step 6: Final answer
    x = 12,851.55

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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.