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Finding the Fourth Proportional to 8,571.39, 12,819.42 and 7,459.68

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Solution

The fourth proportional to 8,571.39, 12,819.42 and 7,459.68 is: 11,156.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.39 : 12,819.42 = 7,459.68 : x
  2. Step 2: Convert to fraction form
    8,571.39/12,819.42 = 7,459.68/x
  3. Step 3: Cross multiply
    8,571.39x = 12,819.42 × 7,459.68
  4. Step 4: Simplify right side
    8,571.39x = 95,628,770.99
  5. Step 5: Solve for x
    x = 95,628,770.99/8,571.39
  6. Step 6: Final answer
    x = 11,156.74

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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.