Home / 21,278.31-31,922.52-10,722.39

Finding the Fourth Proportional to 21,278.31, 31,922.52 and 10,722.39

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Solution

The fourth proportional to 21,278.31, 31,922.52 and 10,722.39 is: 16,086.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.31 : 31,922.52 = 10,722.39 : x
  2. Step 2: Convert to fraction form
    21,278.31/31,922.52 = 10,722.39/x
  3. Step 3: Cross multiply
    21,278.31x = 31,922.52 × 10,722.39
  4. Step 4: Simplify right side
    21,278.31x = 342,285,709.22
  5. Step 5: Solve for x
    x = 342,285,709.22/21,278.31
  6. Step 6: Final answer
    x = 16,086.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.