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Finding the Fourth Proportional to 18,633.92, 25,722.88 and 13,319.52

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Solution

The fourth proportional to 18,633.92, 25,722.88 and 13,319.52 is: 18,386.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,633.92 : 25,722.88 = 13,319.52 : x
  2. Step 2: Convert to fraction form
    18,633.92/25,722.88 = 13,319.52/x
  3. Step 3: Cross multiply
    18,633.92x = 25,722.88 × 13,319.52
  4. Step 4: Simplify right side
    18,633.92x = 342,616,414.62
  5. Step 5: Solve for x
    x = 342,616,414.62/18,633.92
  6. Step 6: Final answer
    x = 18,386.71

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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.