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Finding the Fourth Proportional to 11,459.84, 17,189.84 and 3,139.68

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Solution

The fourth proportional to 11,459.84, 17,189.84 and 3,139.68 is: 4,709.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,459.84 : 17,189.84 = 3,139.68 : x
  2. Step 2: Convert to fraction form
    11,459.84/17,189.84 = 3,139.68/x
  3. Step 3: Cross multiply
    11,459.84x = 17,189.84 × 3,139.68
  4. Step 4: Simplify right side
    11,459.84x = 53,970,596.85
  5. Step 5: Solve for x
    x = 53,970,596.85/11,459.84
  6. Step 6: Final answer
    x = 4,709.54

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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.