Home / 31,719.40-43,772.10-18,290.60

Finding the Fourth Proportional to 31,719.40, 43,772.10 and 18,290.60

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Solution

The fourth proportional to 31,719.40, 43,772.10 and 18,290.60 is: 25,240.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,719.40 : 43,772.10 = 18,290.60 : x
  2. Step 2: Convert to fraction form
    31,719.40/43,772.10 = 18,290.60/x
  3. Step 3: Cross multiply
    31,719.40x = 43,772.10 × 18,290.60
  4. Step 4: Simplify right side
    31,719.40x = 800,617,972.26
  5. Step 5: Solve for x
    x = 800,617,972.26/31,719.40
  6. Step 6: Final answer
    x = 25,240.64

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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.