Home / 10,515.66-15,775.14-3,121.26

Finding the Fourth Proportional to 10,515.66, 15,775.14 and 3,121.26

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Solution

The fourth proportional to 10,515.66, 15,775.14 and 3,121.26 is: 4,682.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.66 : 15,775.14 = 3,121.26 : x
  2. Step 2: Convert to fraction form
    10,515.66/15,775.14 = 3,121.26/x
  3. Step 3: Cross multiply
    10,515.66x = 15,775.14 × 3,121.26
  4. Step 4: Simplify right side
    10,515.66x = 49,238,313.48
  5. Step 5: Solve for x
    x = 49,238,313.48/10,515.66
  6. Step 6: Final answer
    x = 4,682.38

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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.