Home / 20,673.87-28,529.09-11,721.98

Finding the Fourth Proportional to 20,673.87, 28,529.09 and 11,721.98

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Solution

The fourth proportional to 20,673.87, 28,529.09 and 11,721.98 is: 16,175.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.87 : 28,529.09 = 11,721.98 : x
  2. Step 2: Convert to fraction form
    20,673.87/28,529.09 = 11,721.98/x
  3. Step 3: Cross multiply
    20,673.87x = 28,529.09 × 11,721.98
  4. Step 4: Simplify right side
    20,673.87x = 334,417,446.10
  5. Step 5: Solve for x
    x = 334,417,446.10/20,673.87
  6. Step 6: Final answer
    x = 16,175.85

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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.