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Finding the Fourth Proportional to 18,874.35, 28,311.42 and 4,834.35

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Solution

The fourth proportional to 18,874.35, 28,311.42 and 4,834.35 is: 7,251.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.35 : 28,311.42 = 4,834.35 : x
  2. Step 2: Convert to fraction form
    18,874.35/28,311.42 = 4,834.35/x
  3. Step 3: Cross multiply
    18,874.35x = 28,311.42 × 4,834.35
  4. Step 4: Simplify right side
    18,874.35x = 136,867,313.28
  5. Step 5: Solve for x
    x = 136,867,313.28/18,874.35
  6. Step 6: Final answer
    x = 7,251.50

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Double scale
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Similar ratio
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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.