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Finding the Fourth Proportional to 15,072.25, 20,799.71 and 8,448.25

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Solution

The fourth proportional to 15,072.25, 20,799.71 and 8,448.25 is: 11,658.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.25 : 20,799.71 = 8,448.25 : x
  2. Step 2: Convert to fraction form
    15,072.25/20,799.71 = 8,448.25/x
  3. Step 3: Cross multiply
    15,072.25x = 20,799.71 × 8,448.25
  4. Step 4: Simplify right side
    15,072.25x = 175,721,107.77
  5. Step 5: Solve for x
    x = 175,721,107.77/15,072.25
  6. Step 6: Final answer
    x = 11,658.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.