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Finding the Fourth Proportional to 20,604, 28,434.08 and 11,652.85

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Solution

The fourth proportional to 20,604, 28,434.08 and 11,652.85 is: 16,081.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604 : 28,434.08 = 11,652.85 : x
  2. Step 2: Convert to fraction form
    20,604/28,434.08 = 11,652.85/x
  3. Step 3: Cross multiply
    20,604x = 28,434.08 × 11,652.85
  4. Step 4: Simplify right side
    20,604x = 331,338,069.13
  5. Step 5: Solve for x
    x = 331,338,069.13/20,604
  6. Step 6: Final answer
    x = 16,081.25

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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.