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Finding the Fourth Proportional to 67,660.48, 101,500.44 and 20,917

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Solution

The fourth proportional to 67,660.48, 101,500.44 and 20,917 is: 31,378.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,660.48 : 101,500.44 = 20,917 : x
  2. Step 2: Convert to fraction form
    67,660.48/101,500.44 = 20,917/x
  3. Step 3: Cross multiply
    67,660.48x = 101,500.44 × 20,917
  4. Step 4: Simplify right side
    67,660.48x = 2,123,084,703.48
  5. Step 5: Solve for x
    x = 2,123,084,703.48/67,660.48
  6. Step 6: Final answer
    x = 31,378.50

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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.