Home / 5,167.72-7,129.84-2,928.78

Finding the Fourth Proportional to 5,167.72, 7,129.84 and 2,928.78

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Solution

The fourth proportional to 5,167.72, 7,129.84 and 2,928.78 is: 4,040.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,167.72 : 7,129.84 = 2,928.78 : x
  2. Step 2: Convert to fraction form
    5,167.72/7,129.84 = 2,928.78/x
  3. Step 3: Cross multiply
    5,167.72x = 7,129.84 × 2,928.78
  4. Step 4: Simplify right side
    5,167.72x = 20,881,697.15
  5. Step 5: Solve for x
    x = 20,881,697.15/5,167.72
  6. Step 6: Final answer
    x = 4,040.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.