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Finding the Fourth Proportional to 18,358.25, 27,538.74 and 5,211.68

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Solution

The fourth proportional to 18,358.25, 27,538.74 and 5,211.68 is: 7,817.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.25 : 27,538.74 = 5,211.68 : x
  2. Step 2: Convert to fraction form
    18,358.25/27,538.74 = 5,211.68/x
  3. Step 3: Cross multiply
    18,358.25x = 27,538.74 × 5,211.68
  4. Step 4: Simplify right side
    18,358.25x = 143,523,100.48
  5. Step 5: Solve for x
    x = 143,523,100.48/18,358.25
  6. Step 6: Final answer
    x = 7,817.91

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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.