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Finding the Fourth Proportional to 7,961.70, 10,987.20 and 4,424.97

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Solution

The fourth proportional to 7,961.70, 10,987.20 and 4,424.97 is: 6,106.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.70 : 10,987.20 = 4,424.97 : x
  2. Step 2: Convert to fraction form
    7,961.70/10,987.20 = 4,424.97/x
  3. Step 3: Cross multiply
    7,961.70x = 10,987.20 × 4,424.97
  4. Step 4: Simplify right side
    7,961.70x = 48,618,030.38
  5. Step 5: Solve for x
    x = 48,618,030.38/7,961.70
  6. Step 6: Final answer
    x = 6,106.49

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.