Home / 10,571.11-15,855.40-2,780.53

Finding the Fourth Proportional to 10,571.11, 15,855.40 and 2,780.53

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Solution

The fourth proportional to 10,571.11, 15,855.40 and 2,780.53 is: 4,170.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,571.11 : 15,855.40 = 2,780.53 : x
  2. Step 2: Convert to fraction form
    10,571.11/15,855.40 = 2,780.53/x
  3. Step 3: Cross multiply
    10,571.11x = 15,855.40 × 2,780.53
  4. Step 4: Simplify right side
    10,571.11x = 44,086,379.20
  5. Step 5: Solve for x
    x = 44,086,379.20/10,571.11
  6. Step 6: Final answer
    x = 4,170.46

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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.