Home / 10,505.41-15,758.07-3,109.90

Finding the Fourth Proportional to 10,505.41, 15,758.07 and 3,109.90

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Solution

The fourth proportional to 10,505.41, 15,758.07 and 3,109.90 is: 4,664.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,505.41 : 15,758.07 = 3,109.90 : x
  2. Step 2: Convert to fraction form
    10,505.41/15,758.07 = 3,109.90/x
  3. Step 3: Cross multiply
    10,505.41x = 15,758.07 × 3,109.90
  4. Step 4: Simplify right side
    10,505.41x = 49,006,021.89
  5. Step 5: Solve for x
    x = 49,006,021.89/10,505.41
  6. Step 6: Final answer
    x = 4,664.84

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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.