Home / 31,356.72-47,039.46-9,171.75

Finding the Fourth Proportional to 31,356.72, 47,039.46 and 9,171.75

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Solution

The fourth proportional to 31,356.72, 47,039.46 and 9,171.75 is: 13,758.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,356.72 : 47,039.46 = 9,171.75 : x
  2. Step 2: Convert to fraction form
    31,356.72/47,039.46 = 9,171.75/x
  3. Step 3: Cross multiply
    31,356.72x = 47,039.46 × 9,171.75
  4. Step 4: Simplify right side
    31,356.72x = 431,434,167.26
  5. Step 5: Solve for x
    x = 431,434,167.26/31,356.72
  6. Step 6: Final answer
    x = 13,758.91

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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.