Home / 18,921.60-28,338.62-18,265.50

Finding the Fourth Proportional to 18,921.60, 28,338.62 and 18,265.50

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Solution

The fourth proportional to 18,921.60, 28,338.62 and 18,265.50 is: 27,355.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.60 : 28,338.62 = 18,265.50 : x
  2. Step 2: Convert to fraction form
    18,921.60/28,338.62 = 18,265.50/x
  3. Step 3: Cross multiply
    18,921.60x = 28,338.62 × 18,265.50
  4. Step 4: Simplify right side
    18,921.60x = 517,619,063.61
  5. Step 5: Solve for x
    x = 517,619,063.61/18,921.60
  6. Step 6: Final answer
    x = 27,355.99

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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.