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Finding the Fourth Proportional to 22,340.30, 30,829.65 and 12,908.87

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Solution

The fourth proportional to 22,340.30, 30,829.65 and 12,908.87 is: 17,814.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,340.30 : 30,829.65 = 12,908.87 : x
  2. Step 2: Convert to fraction form
    22,340.30/30,829.65 = 12,908.87/x
  3. Step 3: Cross multiply
    22,340.30x = 30,829.65 × 12,908.87
  4. Step 4: Simplify right side
    22,340.30x = 397,975,789.85
  5. Step 5: Solve for x
    x = 397,975,789.85/22,340.30
  6. Step 6: Final answer
    x = 17,814.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.