Home / 21,278.62-29,351.19-15,300.82

Finding the Fourth Proportional to 21,278.62, 29,351.19 and 15,300.82

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Solution

The fourth proportional to 21,278.62, 29,351.19 and 15,300.82 is: 21,105.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.62 : 29,351.19 = 15,300.82 : x
  2. Step 2: Convert to fraction form
    21,278.62/29,351.19 = 15,300.82/x
  3. Step 3: Cross multiply
    21,278.62x = 29,351.19 × 15,300.82
  4. Step 4: Simplify right side
    21,278.62x = 449,097,274.98
  5. Step 5: Solve for x
    x = 449,097,274.98/21,278.62
  6. Step 6: Final answer
    x = 21,105.56

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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.