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Finding the Fourth Proportional to 20,606.16, 28,436.49 and 11,174.70

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Solution

The fourth proportional to 20,606.16, 28,436.49 and 11,174.70 is: 15,421.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.16 : 28,436.49 = 11,174.70 : x
  2. Step 2: Convert to fraction form
    20,606.16/28,436.49 = 11,174.70/x
  3. Step 3: Cross multiply
    20,606.16x = 28,436.49 × 11,174.70
  4. Step 4: Simplify right side
    20,606.16x = 317,769,244.80
  5. Step 5: Solve for x
    x = 317,769,244.80/20,606.16
  6. Step 6: Final answer
    x = 15,421.08

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