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Finding the Fourth Proportional to 15,220.20, 20,923.23 and 13,087.92

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Solution

The fourth proportional to 15,220.20, 20,923.23 and 13,087.92 is: 17,991.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.20 : 20,923.23 = 13,087.92 : x
  2. Step 2: Convert to fraction form
    15,220.20/20,923.23 = 13,087.92/x
  3. Step 3: Cross multiply
    15,220.20x = 20,923.23 × 13,087.92
  4. Step 4: Simplify right side
    15,220.20x = 273,841,560.38
  5. Step 5: Solve for x
    x = 273,841,560.38/15,220.20
  6. Step 6: Final answer
    x = 17,991.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.