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Finding the Fourth Proportional to 7,992.42, 11,988.63 and 2,445.78

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Solution

The fourth proportional to 7,992.42, 11,988.63 and 2,445.78 is: 3,668.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,992.42 : 11,988.63 = 2,445.78 : x
  2. Step 2: Convert to fraction form
    7,992.42/11,988.63 = 2,445.78/x
  3. Step 3: Cross multiply
    7,992.42x = 11,988.63 × 2,445.78
  4. Step 4: Simplify right side
    7,992.42x = 29,321,551.48
  5. Step 5: Solve for x
    x = 29,321,551.48/7,992.42
  6. Step 6: Final answer
    x = 3,668.67

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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.