Home / 12,988.87-19,481.68-5,197.75

Finding the Fourth Proportional to 12,988.87, 19,481.68 and 5,197.75

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Solution

The fourth proportional to 12,988.87, 19,481.68 and 5,197.75 is: 7,795.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.87 : 19,481.68 = 5,197.75 : x
  2. Step 2: Convert to fraction form
    12,988.87/19,481.68 = 5,197.75/x
  3. Step 3: Cross multiply
    12,988.87x = 19,481.68 × 5,197.75
  4. Step 4: Simplify right side
    12,988.87x = 101,260,860.01
  5. Step 5: Solve for x
    x = 101,260,860.01/12,988.87
  6. Step 6: Final answer
    x = 7,795.97

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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.