Home / 21,710.21-29,960.97-12,278.75

Finding the Fourth Proportional to 21,710.21, 29,960.97 and 12,278.75

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Solution

The fourth proportional to 21,710.21, 29,960.97 and 12,278.75 is: 16,945.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.21 : 29,960.97 = 12,278.75 : x
  2. Step 2: Convert to fraction form
    21,710.21/29,960.97 = 12,278.75/x
  3. Step 3: Cross multiply
    21,710.21x = 29,960.97 × 12,278.75
  4. Step 4: Simplify right side
    21,710.21x = 367,883,260.39
  5. Step 5: Solve for x
    x = 367,883,260.39/21,710.21
  6. Step 6: Final answer
    x = 16,945.17

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1.5x scale

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.