Home / 21,061.92-31,578.24-10,666.56

Finding the Fourth Proportional to 21,061.92, 31,578.24 and 10,666.56

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Solution

The fourth proportional to 21,061.92, 31,578.24 and 10,666.56 is: 15,992.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.92 : 31,578.24 = 10,666.56 : x
  2. Step 2: Convert to fraction form
    21,061.92/31,578.24 = 10,666.56/x
  3. Step 3: Cross multiply
    21,061.92x = 31,578.24 × 10,666.56
  4. Step 4: Simplify right side
    21,061.92x = 336,831,191.65
  5. Step 5: Solve for x
    x = 336,831,191.65/21,061.92
  6. Step 6: Final answer
    x = 15,992.43

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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.