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Finding the Fourth Proportional to 20,464, 28,253.88 and 13,402.96

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Solution

The fourth proportional to 20,464, 28,253.88 and 13,402.96 is: 18,504.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,464 : 28,253.88 = 13,402.96 : x
  2. Step 2: Convert to fraction form
    20,464/28,253.88 = 13,402.96/x
  3. Step 3: Cross multiply
    20,464x = 28,253.88 × 13,402.96
  4. Step 4: Simplify right side
    20,464x = 378,685,623.48
  5. Step 5: Solve for x
    x = 378,685,623.48/20,464
  6. Step 6: Final answer
    x = 18,504.97

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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.