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Finding the Fourth Proportional to 30,394.39, 41,894.04 and 20,319.16

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Solution

The fourth proportional to 30,394.39, 41,894.04 and 20,319.16 is: 28,006.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,394.39 : 41,894.04 = 20,319.16 : x
  2. Step 2: Convert to fraction form
    30,394.39/41,894.04 = 20,319.16/x
  3. Step 3: Cross multiply
    30,394.39x = 41,894.04 × 20,319.16
  4. Step 4: Simplify right side
    30,394.39x = 851,251,701.81
  5. Step 5: Solve for x
    x = 851,251,701.81/30,394.39
  6. Step 6: Final answer
    x = 28,006.87

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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.