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Finding the Fourth Proportional to 7,175.64, 10,763.45 and 1,981.50

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Solution

The fourth proportional to 7,175.64, 10,763.45 and 1,981.50 is: 2,972.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.64 : 10,763.45 = 1,981.50 : x
  2. Step 2: Convert to fraction form
    7,175.64/10,763.45 = 1,981.50/x
  3. Step 3: Cross multiply
    7,175.64x = 10,763.45 × 1,981.50
  4. Step 4: Simplify right side
    7,175.64x = 21,327,766.27
  5. Step 5: Solve for x
    x = 21,327,766.27/7,175.64
  6. Step 6: Final answer
    x = 2,972.25

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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.