Home / 21,710.25-29,960.15-12,278.61

Finding the Fourth Proportional to 21,710.25, 29,960.15 and 12,278.61

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Solution

The fourth proportional to 21,710.25, 29,960.15 and 12,278.61 is: 16,944.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.25 : 29,960.15 = 12,278.61 : x
  2. Step 2: Convert to fraction form
    21,710.25/29,960.15 = 12,278.61/x
  3. Step 3: Cross multiply
    21,710.25x = 29,960.15 × 12,278.61
  4. Step 4: Simplify right side
    21,710.25x = 367,868,936.00
  5. Step 5: Solve for x
    x = 367,868,936.00/21,710.25
  6. Step 6: Final answer
    x = 16,944.48

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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.