Home / 31,979.80-47,904.90-18,112.60

Finding the Fourth Proportional to 31,979.80, 47,904.90 and 18,112.60

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Solution

The fourth proportional to 31,979.80, 47,904.90 and 18,112.60 is: 27,132.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,979.80 : 47,904.90 = 18,112.60 : x
  2. Step 2: Convert to fraction form
    31,979.80/47,904.90 = 18,112.60/x
  3. Step 3: Cross multiply
    31,979.80x = 47,904.90 × 18,112.60
  4. Step 4: Simplify right side
    31,979.80x = 867,682,291.74
  5. Step 5: Solve for x
    x = 867,682,291.74/31,979.80
  6. Step 6: Final answer
    x = 27,132.20

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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.