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Finding the Fourth Proportional to 20,410.97, 30,601.97 and 7,920.46

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Solution

The fourth proportional to 20,410.97, 30,601.97 and 7,920.46 is: 11,875.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.97 : 30,601.97 = 7,920.46 : x
  2. Step 2: Convert to fraction form
    20,410.97/30,601.97 = 7,920.46/x
  3. Step 3: Cross multiply
    20,410.97x = 30,601.97 × 7,920.46
  4. Step 4: Simplify right side
    20,410.97x = 242,381,486.69
  5. Step 5: Solve for x
    x = 242,381,486.69/20,410.97
  6. Step 6: Final answer
    x = 11,875.06

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1.5x scale

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.