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Finding the Fourth Proportional to 21,907.73, 32,862.77 and 7,115.55

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Solution

The fourth proportional to 21,907.73, 32,862.77 and 7,115.55 is: 10,673.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907.73 : 32,862.77 = 7,115.55 : x
  2. Step 2: Convert to fraction form
    21,907.73/32,862.77 = 7,115.55/x
  3. Step 3: Cross multiply
    21,907.73x = 32,862.77 × 7,115.55
  4. Step 4: Simplify right side
    21,907.73x = 233,836,647.50
  5. Step 5: Solve for x
    x = 233,836,647.50/21,907.73
  6. Step 6: Final answer
    x = 10,673.71

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1.5x scale

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.