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Finding the Fourth Proportional to 20,503.47, 30,759.30 and 7,356.87

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Solution

The fourth proportional to 20,503.47, 30,759.30 and 7,356.87 is: 11,036.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.47 : 30,759.30 = 7,356.87 : x
  2. Step 2: Convert to fraction form
    20,503.47/30,759.30 = 7,356.87/x
  3. Step 3: Cross multiply
    20,503.47x = 30,759.30 × 7,356.87
  4. Step 4: Simplify right side
    20,503.47x = 226,292,171.39
  5. Step 5: Solve for x
    x = 226,292,171.39/20,503.47
  6. Step 6: Final answer
    x = 11,036.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.