Home / 20,919.44-28,869-11,487.92

Finding the Fourth Proportional to 20,919.44, 28,869 and 11,487.92

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Solution

The fourth proportional to 20,919.44, 28,869 and 11,487.92 is: 15,853.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.44 : 28,869 = 11,487.92 : x
  2. Step 2: Convert to fraction form
    20,919.44/28,869 = 11,487.92/x
  3. Step 3: Cross multiply
    20,919.44x = 28,869 × 11,487.92
  4. Step 4: Simplify right side
    20,919.44x = 331,644,762.48
  5. Step 5: Solve for x
    x = 331,644,762.48/20,919.44
  6. Step 6: Final answer
    x = 15,853.42

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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.