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Finding the Fourth Proportional to 7,965.74, 11,930.07 and 7,688.90

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Solution

The fourth proportional to 7,965.74, 11,930.07 and 7,688.90 is: 11,515.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.74 : 11,930.07 = 7,688.90 : x
  2. Step 2: Convert to fraction form
    7,965.74/11,930.07 = 7,688.90/x
  3. Step 3: Cross multiply
    7,965.74x = 11,930.07 × 7,688.90
  4. Step 4: Simplify right side
    7,965.74x = 91,729,115.22
  5. Step 5: Solve for x
    x = 91,729,115.22/7,965.74
  6. Step 6: Final answer
    x = 11,515.45

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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.