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Finding the Fourth Proportional to 18,520.71, 27,781.14 and 4,480.71

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Solution

The fourth proportional to 18,520.71, 27,781.14 and 4,480.71 is: 6,721.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.71 : 27,781.14 = 4,480.71 : x
  2. Step 2: Convert to fraction form
    18,520.71/27,781.14 = 4,480.71/x
  3. Step 3: Cross multiply
    18,520.71x = 27,781.14 × 4,480.71
  4. Step 4: Simplify right side
    18,520.71x = 124,479,231.81
  5. Step 5: Solve for x
    x = 124,479,231.81/18,520.71
  6. Step 6: Final answer
    x = 6,721.08

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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.