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Finding the Fourth Proportional to 18,445.95, 27,668.88 and 7,909.14

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Solution

The fourth proportional to 18,445.95, 27,668.88 and 7,909.14 is: 11,863.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,445.95 : 27,668.88 = 7,909.14 : x
  2. Step 2: Convert to fraction form
    18,445.95/27,668.88 = 7,909.14/x
  3. Step 3: Cross multiply
    18,445.95x = 27,668.88 × 7,909.14
  4. Step 4: Simplify right side
    18,445.95x = 218,837,045.56
  5. Step 5: Solve for x
    x = 218,837,045.56/18,445.95
  6. Step 6: Final answer
    x = 11,863.69

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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.