Home / 20,429.16-28,204.06-13,367.90

Finding the Fourth Proportional to 20,429.16, 28,204.06 and 13,367.90

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Solution

The fourth proportional to 20,429.16, 28,204.06 and 13,367.90 is: 18,455.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.16 : 28,204.06 = 13,367.90 : x
  2. Step 2: Convert to fraction form
    20,429.16/28,204.06 = 13,367.90/x
  3. Step 3: Cross multiply
    20,429.16x = 28,204.06 × 13,367.90
  4. Step 4: Simplify right side
    20,429.16x = 377,029,053.67
  5. Step 5: Solve for x
    x = 377,029,053.67/20,429.16
  6. Step 6: Final answer
    x = 18,455.44

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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.