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Finding the Fourth Proportional to 8,763.80, 13,145.69 and 2,920.46

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Solution

The fourth proportional to 8,763.80, 13,145.69 and 2,920.46 is: 4,380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.80 : 13,145.69 = 2,920.46 : x
  2. Step 2: Convert to fraction form
    8,763.80/13,145.69 = 2,920.46/x
  3. Step 3: Cross multiply
    8,763.80x = 13,145.69 × 2,920.46
  4. Step 4: Simplify right side
    8,763.80x = 38,391,403.39
  5. Step 5: Solve for x
    x = 38,391,403.39/8,763.80
  6. Step 6: Final answer
    x = 4,380.68

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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.