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Finding the Fourth Proportional to 35,503.11, 48,978.93 and 20,392.31

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Solution

The fourth proportional to 35,503.11, 48,978.93 and 20,392.31 is: 28,132.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,503.11 : 48,978.93 = 20,392.31 : x
  2. Step 2: Convert to fraction form
    35,503.11/48,978.93 = 20,392.31/x
  3. Step 3: Cross multiply
    35,503.11x = 48,978.93 × 20,392.31
  4. Step 4: Simplify right side
    35,503.11x = 998,793,332.73
  5. Step 5: Solve for x
    x = 998,793,332.73/35,503.11
  6. Step 6: Final answer
    x = 28,132.56

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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.