Home / 20,411.73-30,603.20-7,921.35

Finding the Fourth Proportional to 20,411.73, 30,603.20 and 7,921.35

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Solution

The fourth proportional to 20,411.73, 30,603.20 and 7,921.35 is: 11,876.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.73 : 30,603.20 = 7,921.35 : x
  2. Step 2: Convert to fraction form
    20,411.73/30,603.20 = 7,921.35/x
  3. Step 3: Cross multiply
    20,411.73x = 30,603.20 × 7,921.35
  4. Step 4: Simplify right side
    20,411.73x = 242,418,618.71
  5. Step 5: Solve for x
    x = 242,418,618.71/20,411.73
  6. Step 6: Final answer
    x = 11,876.44

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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.