Home / 10,518.11-15,772.53-3,939.68

Finding the Fourth Proportional to 10,518.11, 15,772.53 and 3,939.68

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Solution

The fourth proportional to 10,518.11, 15,772.53 and 3,939.68 is: 5,907.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.11 : 15,772.53 = 3,939.68 : x
  2. Step 2: Convert to fraction form
    10,518.11/15,772.53 = 3,939.68/x
  3. Step 3: Cross multiply
    10,518.11x = 15,772.53 × 3,939.68
  4. Step 4: Simplify right side
    10,518.11x = 62,138,642.13
  5. Step 5: Solve for x
    x = 62,138,642.13/10,518.11
  6. Step 6: Final answer
    x = 5,907.78

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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.