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Finding the Fourth Proportional to 8,763.72, 13,145.34 and 2,920.44

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Solution

The fourth proportional to 8,763.72, 13,145.34 and 2,920.44 is: 4,380.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.72 : 13,145.34 = 2,920.44 : x
  2. Step 2: Convert to fraction form
    8,763.72/13,145.34 = 2,920.44/x
  3. Step 3: Cross multiply
    8,763.72x = 13,145.34 × 2,920.44
  4. Step 4: Simplify right side
    8,763.72x = 38,390,176.75
  5. Step 5: Solve for x
    x = 38,390,176.75/8,763.72
  6. Step 6: Final answer
    x = 4,380.58

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Half scale
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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.