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Finding the Fourth Proportional to 20,391.96, 30,553.05 and 15,947.91

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Solution

The fourth proportional to 20,391.96, 30,553.05 and 15,947.91 is: 23,894.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.96 : 30,553.05 = 15,947.91 : x
  2. Step 2: Convert to fraction form
    20,391.96/30,553.05 = 15,947.91/x
  3. Step 3: Cross multiply
    20,391.96x = 30,553.05 × 15,947.91
  4. Step 4: Simplify right side
    20,391.96x = 487,257,291.63
  5. Step 5: Solve for x
    x = 487,257,291.63/20,391.96
  6. Step 6: Final answer
    x = 23,894.58

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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.