Home / 21,278.65-31,898.13-7,229.07

Finding the Fourth Proportional to 21,278.65, 31,898.13 and 7,229.07

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Solution

The fourth proportional to 21,278.65, 31,898.13 and 7,229.07 is: 10,836.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.65 : 31,898.13 = 7,229.07 : x
  2. Step 2: Convert to fraction form
    21,278.65/31,898.13 = 7,229.07/x
  3. Step 3: Cross multiply
    21,278.65x = 31,898.13 × 7,229.07
  4. Step 4: Simplify right side
    21,278.65x = 230,593,814.64
  5. Step 5: Solve for x
    x = 230,593,814.64/21,278.65
  6. Step 6: Final answer
    x = 10,836.86

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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.