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Finding the Fourth Proportional to 22,006.40, 30,369.84 and 13,059.20

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Solution

The fourth proportional to 22,006.40, 30,369.84 and 13,059.20 is: 18,022.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,006.40 : 30,369.84 = 13,059.20 : x
  2. Step 2: Convert to fraction form
    22,006.40/30,369.84 = 13,059.20/x
  3. Step 3: Cross multiply
    22,006.40x = 30,369.84 × 13,059.20
  4. Step 4: Simplify right side
    22,006.40x = 396,605,814.53
  5. Step 5: Solve for x
    x = 396,605,814.53/22,006.40
  6. Step 6: Final answer
    x = 18,022.29

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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.