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Finding the Fourth Proportional to 21,063.11, 31,570.36 and 7,907.09

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Solution

The fourth proportional to 21,063.11, 31,570.36 and 7,907.09 is: 11,851.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.11 : 31,570.36 = 7,907.09 : x
  2. Step 2: Convert to fraction form
    21,063.11/31,570.36 = 7,907.09/x
  3. Step 3: Cross multiply
    21,063.11x = 31,570.36 × 7,907.09
  4. Step 4: Simplify right side
    21,063.11x = 249,629,500.23
  5. Step 5: Solve for x
    x = 249,629,500.23/21,063.11
  6. Step 6: Final answer
    x = 11,851.51

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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.