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Finding the Fourth Proportional to 9,278.96, 12,794.64 and 7,149.74

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Solution

The fourth proportional to 9,278.96, 12,794.64 and 7,149.74 is: 9,858.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,278.96 : 12,794.64 = 7,149.74 : x
  2. Step 2: Convert to fraction form
    9,278.96/12,794.64 = 7,149.74/x
  3. Step 3: Cross multiply
    9,278.96x = 12,794.64 × 7,149.74
  4. Step 4: Simplify right side
    9,278.96x = 91,478,349.39
  5. Step 5: Solve for x
    x = 91,478,349.39/9,278.96
  6. Step 6: Final answer
    x = 9,858.69

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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.