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Finding the Fourth Proportional to 18,278.20, 27,368.70 and 11,668.60

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Solution

The fourth proportional to 18,278.20, 27,368.70 and 11,668.60 is: 17,471.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.20 : 27,368.70 = 11,668.60 : x
  2. Step 2: Convert to fraction form
    18,278.20/27,368.70 = 11,668.60/x
  3. Step 3: Cross multiply
    18,278.20x = 27,368.70 × 11,668.60
  4. Step 4: Simplify right side
    18,278.20x = 319,354,412.82
  5. Step 5: Solve for x
    x = 319,354,412.82/18,278.20
  6. Step 6: Final answer
    x = 17,471.87

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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.