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Finding the Fourth Proportional to 22,720.71, 34,076.95 and 6,921.96

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Solution

The fourth proportional to 22,720.71, 34,076.95 and 6,921.96 is: 10,381.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,720.71 : 34,076.95 = 6,921.96 : x
  2. Step 2: Convert to fraction form
    22,720.71/34,076.95 = 6,921.96/x
  3. Step 3: Cross multiply
    22,720.71x = 34,076.95 × 6,921.96
  4. Step 4: Simplify right side
    22,720.71x = 235,879,079.83
  5. Step 5: Solve for x
    x = 235,879,079.83/22,720.71
  6. Step 6: Final answer
    x = 10,381.68

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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.