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Finding the Fourth Proportional to 20,804.52, 28,691.52 and 13,738.08

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Solution

The fourth proportional to 20,804.52, 28,691.52 and 13,738.08 is: 18,946.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.52 : 28,691.52 = 13,738.08 : x
  2. Step 2: Convert to fraction form
    20,804.52/28,691.52 = 13,738.08/x
  3. Step 3: Cross multiply
    20,804.52x = 28,691.52 × 13,738.08
  4. Step 4: Simplify right side
    20,804.52x = 394,166,397.08
  5. Step 5: Solve for x
    x = 394,166,397.08/20,804.52
  6. Step 6: Final answer
    x = 18,946.19

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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.