Home / 20,919.38-28,868.94-11,488.14

Finding the Fourth Proportional to 20,919.38, 28,868.94 and 11,488.14

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Solution

The fourth proportional to 20,919.38, 28,868.94 and 11,488.14 is: 15,853.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.38 : 28,868.94 = 11,488.14 : x
  2. Step 2: Convert to fraction form
    20,919.38/28,868.94 = 11,488.14/x
  3. Step 3: Cross multiply
    20,919.38x = 28,868.94 × 11,488.14
  4. Step 4: Simplify right side
    20,919.38x = 331,650,424.37
  5. Step 5: Solve for x
    x = 331,650,424.37/20,919.38
  6. Step 6: Final answer
    x = 15,853.74

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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.