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Finding the Fourth Proportional to 26,700, 39,990.32 and 18,884.96

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Solution

The fourth proportional to 26,700, 39,990.32 and 18,884.96 is: 28,285.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,700 : 39,990.32 = 18,884.96 : x
  2. Step 2: Convert to fraction form
    26,700/39,990.32 = 18,884.96/x
  3. Step 3: Cross multiply
    26,700x = 39,990.32 × 18,884.96
  4. Step 4: Simplify right side
    26,700x = 755,215,593.59
  5. Step 5: Solve for x
    x = 755,215,593.59/26,700
  6. Step 6: Final answer
    x = 28,285.23

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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.