Home / 21,252.78-31,880.31-6,460.56

Finding the Fourth Proportional to 21,252.78, 31,880.31 and 6,460.56

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Solution

The fourth proportional to 21,252.78, 31,880.31 and 6,460.56 is: 9,691.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,252.78 : 31,880.31 = 6,460.56 : x
  2. Step 2: Convert to fraction form
    21,252.78/31,880.31 = 6,460.56/x
  3. Step 3: Cross multiply
    21,252.78x = 31,880.31 × 6,460.56
  4. Step 4: Simplify right side
    21,252.78x = 205,964,655.57
  5. Step 5: Solve for x
    x = 205,964,655.57/21,252.78
  6. Step 6: Final answer
    x = 9,691.19

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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.