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Finding the Fourth Proportional to 17,989.74, 26,983.64 and 5,509.78

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Solution

The fourth proportional to 17,989.74, 26,983.64 and 5,509.78 is: 8,264.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,989.74 : 26,983.64 = 5,509.78 : x
  2. Step 2: Convert to fraction form
    17,989.74/26,983.64 = 5,509.78/x
  3. Step 3: Cross multiply
    17,989.74x = 26,983.64 × 5,509.78
  4. Step 4: Simplify right side
    17,989.74x = 148,673,920.00
  5. Step 5: Solve for x
    x = 148,673,920.00/17,989.74
  6. Step 6: Final answer
    x = 8,264.37

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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.