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Finding the Fourth Proportional to 26,644.92, 39,905.12 and 21,060.80

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Solution

The fourth proportional to 26,644.92, 39,905.12 and 21,060.80 is: 31,541.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,644.92 : 39,905.12 = 21,060.80 : x
  2. Step 2: Convert to fraction form
    26,644.92/39,905.12 = 21,060.80/x
  3. Step 3: Cross multiply
    26,644.92x = 39,905.12 × 21,060.80
  4. Step 4: Simplify right side
    26,644.92x = 840,433,751.30
  5. Step 5: Solve for x
    x = 840,433,751.30/26,644.92
  6. Step 6: Final answer
    x = 31,541.99

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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.