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Finding the Fourth Proportional to 30,393.68, 41,893.07 and 20,318.45

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Solution

The fourth proportional to 30,393.68, 41,893.07 and 20,318.45 is: 28,005.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,393.68 : 41,893.07 = 20,318.45 : x
  2. Step 2: Convert to fraction form
    30,393.68/41,893.07 = 20,318.45/x
  3. Step 3: Cross multiply
    30,393.68x = 41,893.07 × 20,318.45
  4. Step 4: Simplify right side
    30,393.68x = 851,202,089.47
  5. Step 5: Solve for x
    x = 851,202,089.47/30,393.68
  6. Step 6: Final answer
    x = 28,005.89

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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.