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Finding the Fourth Proportional to 7,865.67, 11,798.73 and 3,187.92

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Solution

The fourth proportional to 7,865.67, 11,798.73 and 3,187.92 is: 4,781.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,865.67 : 11,798.73 = 3,187.92 : x
  2. Step 2: Convert to fraction form
    7,865.67/11,798.73 = 3,187.92/x
  3. Step 3: Cross multiply
    7,865.67x = 11,798.73 × 3,187.92
  4. Step 4: Simplify right side
    7,865.67x = 37,613,407.34
  5. Step 5: Solve for x
    x = 37,613,407.34/7,865.67
  6. Step 6: Final answer
    x = 4,781.97

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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.