Home / 10,669.87-15,982.48-8,578.55

Finding the Fourth Proportional to 10,669.87, 15,982.48 and 8,578.55

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Solution

The fourth proportional to 10,669.87, 15,982.48 and 8,578.55 is: 12,849.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,669.87 : 15,982.48 = 8,578.55 : x
  2. Step 2: Convert to fraction form
    10,669.87/15,982.48 = 8,578.55/x
  3. Step 3: Cross multiply
    10,669.87x = 15,982.48 × 8,578.55
  4. Step 4: Simplify right side
    10,669.87x = 137,106,554.48
  5. Step 5: Solve for x
    x = 137,106,554.48/10,669.87
  6. Step 6: Final answer
    x = 12,849.88

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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.