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Finding the Fourth Proportional to 15,072.89, 20,800.29 and 8,358.49

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Solution

The fourth proportional to 15,072.89, 20,800.29 and 8,358.49 is: 11,534.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.89 : 20,800.29 = 8,358.49 : x
  2. Step 2: Convert to fraction form
    15,072.89/20,800.29 = 8,358.49/x
  3. Step 3: Cross multiply
    15,072.89x = 20,800.29 × 8,358.49
  4. Step 4: Simplify right side
    15,072.89x = 173,859,073.31
  5. Step 5: Solve for x
    x = 173,859,073.31/15,072.89
  6. Step 6: Final answer
    x = 11,534.56

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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.