Home / 21,072.57-31,608.82-6,281.11

Finding the Fourth Proportional to 21,072.57, 31,608.82 and 6,281.11

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Solution

The fourth proportional to 21,072.57, 31,608.82 and 6,281.11 is: 9,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.57 : 31,608.82 = 6,281.11 : x
  2. Step 2: Convert to fraction form
    21,072.57/31,608.82 = 6,281.11/x
  3. Step 3: Cross multiply
    21,072.57x = 31,608.82 × 6,281.11
  4. Step 4: Simplify right side
    21,072.57x = 198,538,475.39
  5. Step 5: Solve for x
    x = 198,538,475.39/21,072.57
  6. Step 6: Final answer
    x = 9,421.65

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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.