Home / 20,491.76-28,279.28-11,994.72

Finding the Fourth Proportional to 20,491.76, 28,279.28 and 11,994.72

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Solution

The fourth proportional to 20,491.76, 28,279.28 and 11,994.72 is: 16,553.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.76 : 28,279.28 = 11,994.72 : x
  2. Step 2: Convert to fraction form
    20,491.76/28,279.28 = 11,994.72/x
  3. Step 3: Cross multiply
    20,491.76x = 28,279.28 × 11,994.72
  4. Step 4: Simplify right side
    20,491.76x = 339,202,045.40
  5. Step 5: Solve for x
    x = 339,202,045.40/20,491.76
  6. Step 6: Final answer
    x = 16,553.09

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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.