Home / 21,230.94-29,278.71-13,669.98

Finding the Fourth Proportional to 21,230.94, 29,278.71 and 13,669.98

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Solution

The fourth proportional to 21,230.94, 29,278.71 and 13,669.98 is: 18,851.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.94 : 29,278.71 = 13,669.98 : x
  2. Step 2: Convert to fraction form
    21,230.94/29,278.71 = 13,669.98/x
  3. Step 3: Cross multiply
    21,230.94x = 29,278.71 × 13,669.98
  4. Step 4: Simplify right side
    21,230.94x = 400,239,380.13
  5. Step 5: Solve for x
    x = 400,239,380.13/21,230.94
  6. Step 6: Final answer
    x = 18,851.70

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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.