Home / 21,278.58-31,922.49-6,487.11

Finding the Fourth Proportional to 21,278.58, 31,922.49 and 6,487.11

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Solution

The fourth proportional to 21,278.58, 31,922.49 and 6,487.11 is: 9,732.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.58 : 31,922.49 = 6,487.11 : x
  2. Step 2: Convert to fraction form
    21,278.58/31,922.49 = 6,487.11/x
  3. Step 3: Cross multiply
    21,278.58x = 31,922.49 × 6,487.11
  4. Step 4: Simplify right side
    21,278.58x = 207,084,704.10
  5. Step 5: Solve for x
    x = 207,084,704.10/21,278.58
  6. Step 6: Final answer
    x = 9,732.07

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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.