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Finding the Fourth Proportional to 8,805.67, 12,157.44 and 7,859.81

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Solution

The fourth proportional to 8,805.67, 12,157.44 and 7,859.81 is: 10,851.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.67 : 12,157.44 = 7,859.81 : x
  2. Step 2: Convert to fraction form
    8,805.67/12,157.44 = 7,859.81/x
  3. Step 3: Cross multiply
    8,805.67x = 12,157.44 × 7,859.81
  4. Step 4: Simplify right side
    8,805.67x = 95,555,168.49
  5. Step 5: Solve for x
    x = 95,555,168.49/8,805.67
  6. Step 6: Final answer
    x = 10,851.55

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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.