Home / 21,121.64-29,117.82-14,398.64

Finding the Fourth Proportional to 21,121.64, 29,117.82 and 14,398.64

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Solution

The fourth proportional to 21,121.64, 29,117.82 and 14,398.64 is: 19,849.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.64 : 29,117.82 = 14,398.64 : x
  2. Step 2: Convert to fraction form
    21,121.64/29,117.82 = 14,398.64/x
  3. Step 3: Cross multiply
    21,121.64x = 29,117.82 × 14,398.64
  4. Step 4: Simplify right side
    21,121.64x = 419,257,080.56
  5. Step 5: Solve for x
    x = 419,257,080.56/21,121.64
  6. Step 6: Final answer
    x = 19,849.64

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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.