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Finding the Fourth Proportional to 8,763.57, 13,145.42 and 2,920.19

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Solution

The fourth proportional to 8,763.57, 13,145.42 and 2,920.19 is: 4,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.57 : 13,145.42 = 2,920.19 : x
  2. Step 2: Convert to fraction form
    8,763.57/13,145.42 = 2,920.19/x
  3. Step 3: Cross multiply
    8,763.57x = 13,145.42 × 2,920.19
  4. Step 4: Simplify right side
    8,763.57x = 38,387,065.60
  5. Step 5: Solve for x
    x = 38,387,065.60/8,763.57
  6. Step 6: Final answer
    x = 4,380.30

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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.