Home / 20,822.19-28,736.18-11,869.90

Finding the Fourth Proportional to 20,822.19, 28,736.18 and 11,869.90

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Solution

The fourth proportional to 20,822.19, 28,736.18 and 11,869.90 is: 16,381.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.19 : 28,736.18 = 11,869.90 : x
  2. Step 2: Convert to fraction form
    20,822.19/28,736.18 = 11,869.90/x
  3. Step 3: Cross multiply
    20,822.19x = 28,736.18 × 11,869.90
  4. Step 4: Simplify right side
    20,822.19x = 341,095,582.98
  5. Step 5: Solve for x
    x = 341,095,582.98/20,822.19
  6. Step 6: Final answer
    x = 16,381.35

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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.