Home / 31,791.78-43,870.20-18,363.60

Finding the Fourth Proportional to 31,791.78, 43,870.20 and 18,363.60

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Solution

The fourth proportional to 31,791.78, 43,870.20 and 18,363.60 is: 25,340.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,791.78 : 43,870.20 = 18,363.60 : x
  2. Step 2: Convert to fraction form
    31,791.78/43,870.20 = 18,363.60/x
  3. Step 3: Cross multiply
    31,791.78x = 43,870.20 × 18,363.60
  4. Step 4: Simplify right side
    31,791.78x = 805,614,804.72
  5. Step 5: Solve for x
    x = 805,614,804.72/31,791.78
  6. Step 6: Final answer
    x = 25,340.35

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1.5x scale

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.