Home / 21,138.33-31,698.13-9,443.37

Finding the Fourth Proportional to 21,138.33, 31,698.13 and 9,443.37

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Solution

The fourth proportional to 21,138.33, 31,698.13 and 9,443.37 is: 14,160.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.33 : 31,698.13 = 9,443.37 : x
  2. Step 2: Convert to fraction form
    21,138.33/31,698.13 = 9,443.37/x
  3. Step 3: Cross multiply
    21,138.33x = 31,698.13 × 9,443.37
  4. Step 4: Simplify right side
    21,138.33x = 299,337,169.90
  5. Step 5: Solve for x
    x = 299,337,169.90/21,138.33
  6. Step 6: Final answer
    x = 14,160.87

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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.