Home / 31,851.28-43,943.40-21,898

Finding the Fourth Proportional to 31,851.28, 43,943.40 and 21,898

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Solution

The fourth proportional to 31,851.28, 43,943.40 and 21,898 is: 30,211.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,851.28 : 43,943.40 = 21,898 : x
  2. Step 2: Convert to fraction form
    31,851.28/43,943.40 = 21,898/x
  3. Step 3: Cross multiply
    31,851.28x = 43,943.40 × 21,898
  4. Step 4: Simplify right side
    31,851.28x = 962,272,573.20
  5. Step 5: Solve for x
    x = 962,272,573.20/31,851.28
  6. Step 6: Final answer
    x = 30,211.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.