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Finding the Fourth Proportional to 18,578.81, 27,851.80 and 14,215.74

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Solution

The fourth proportional to 18,578.81, 27,851.80 and 14,215.74 is: 21,311.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.81 : 27,851.80 = 14,215.74 : x
  2. Step 2: Convert to fraction form
    18,578.81/27,851.80 = 14,215.74/x
  3. Step 3: Cross multiply
    18,578.81x = 27,851.80 × 14,215.74
  4. Step 4: Simplify right side
    18,578.81x = 395,933,947.33
  5. Step 5: Solve for x
    x = 395,933,947.33/18,578.81
  6. Step 6: Final answer
    x = 21,311.06

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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.