Home / 21,277.31-31,921.02-10,721.39

Finding the Fourth Proportional to 21,277.31, 31,921.02 and 10,721.39

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Solution

The fourth proportional to 21,277.31, 31,921.02 and 10,721.39 is: 16,084.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.31 : 31,921.02 = 10,721.39 : x
  2. Step 2: Convert to fraction form
    21,277.31/31,921.02 = 10,721.39/x
  3. Step 3: Cross multiply
    21,277.31x = 31,921.02 × 10,721.39
  4. Step 4: Simplify right side
    21,277.31x = 342,237,545.01
  5. Step 5: Solve for x
    x = 342,237,545.01/21,277.31
  6. Step 6: Final answer
    x = 16,084.63

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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.