Home / 21,278.70-29,360.52-13,723.56

Finding the Fourth Proportional to 21,278.70, 29,360.52 and 13,723.56

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Solution

The fourth proportional to 21,278.70, 29,360.52 and 13,723.56 is: 18,935.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.70 : 29,360.52 = 13,723.56 : x
  2. Step 2: Convert to fraction form
    21,278.70/29,360.52 = 13,723.56/x
  3. Step 3: Cross multiply
    21,278.70x = 29,360.52 × 13,723.56
  4. Step 4: Simplify right side
    21,278.70x = 402,930,857.85
  5. Step 5: Solve for x
    x = 402,930,857.85/21,278.70
  6. Step 6: Final answer
    x = 18,935.88

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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.