Home / 31,138.44-42,976.62-18,564

Finding the Fourth Proportional to 31,138.44, 42,976.62 and 18,564

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Solution

The fourth proportional to 31,138.44, 42,976.62 and 18,564 is: 25,621.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,138.44 : 42,976.62 = 18,564 : x
  2. Step 2: Convert to fraction form
    31,138.44/42,976.62 = 18,564/x
  3. Step 3: Cross multiply
    31,138.44x = 42,976.62 × 18,564
  4. Step 4: Simplify right side
    31,138.44x = 797,817,973.68
  5. Step 5: Solve for x
    x = 797,817,973.68/31,138.44
  6. Step 6: Final answer
    x = 25,621.64

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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.