Home / 31,628.90-43,639.35-18,203.96

Finding the Fourth Proportional to 31,628.90, 43,639.35 and 18,203.96

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Solution

The fourth proportional to 31,628.90, 43,639.35 and 18,203.96 is: 25,116.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,628.90 : 43,639.35 = 18,203.96 : x
  2. Step 2: Convert to fraction form
    31,628.90/43,639.35 = 18,203.96/x
  3. Step 3: Cross multiply
    31,628.90x = 43,639.35 × 18,203.96
  4. Step 4: Simplify right side
    31,628.90x = 794,408,981.83
  5. Step 5: Solve for x
    x = 794,408,981.83/31,628.90
  6. Step 6: Final answer
    x = 25,116.55

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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.