Home / 21,467.29-29,619.25-12,390.43

Finding the Fourth Proportional to 21,467.29, 29,619.25 and 12,390.43

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Solution

The fourth proportional to 21,467.29, 29,619.25 and 12,390.43 is: 17,095.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,467.29 : 29,619.25 = 12,390.43 : x
  2. Step 2: Convert to fraction form
    21,467.29/29,619.25 = 12,390.43/x
  3. Step 3: Cross multiply
    21,467.29x = 29,619.25 × 12,390.43
  4. Step 4: Simplify right side
    21,467.29x = 366,995,274.75
  5. Step 5: Solve for x
    x = 366,995,274.75/21,467.29
  6. Step 6: Final answer
    x = 17,095.56

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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.