Home / 21,106.25-31,670.31-10,718

Finding the Fourth Proportional to 21,106.25, 31,670.31 and 10,718

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Solution

The fourth proportional to 21,106.25, 31,670.31 and 10,718 is: 16,082.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.25 : 31,670.31 = 10,718 : x
  2. Step 2: Convert to fraction form
    21,106.25/31,670.31 = 10,718/x
  3. Step 3: Cross multiply
    21,106.25x = 31,670.31 × 10,718
  4. Step 4: Simplify right side
    21,106.25x = 339,442,382.58
  5. Step 5: Solve for x
    x = 339,442,382.58/21,106.25
  6. Step 6: Final answer
    x = 16,082.55

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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.