Home / 21,278.94-29,360.88-13,723.80

Finding the Fourth Proportional to 21,278.94, 29,360.88 and 13,723.80

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Solution

The fourth proportional to 21,278.94, 29,360.88 and 13,723.80 is: 18,936.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.94 : 29,360.88 = 13,723.80 : x
  2. Step 2: Convert to fraction form
    21,278.94/29,360.88 = 13,723.80/x
  3. Step 3: Cross multiply
    21,278.94x = 29,360.88 × 13,723.80
  4. Step 4: Simplify right side
    21,278.94x = 402,942,844.94
  5. Step 5: Solve for x
    x = 402,942,844.94/21,278.94
  6. Step 6: Final answer
    x = 18,936.23

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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.