Home / 20,646.22-28,491.92-11,214.78

Finding the Fourth Proportional to 20,646.22, 28,491.92 and 11,214.78

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Solution

The fourth proportional to 20,646.22, 28,491.92 and 11,214.78 is: 15,476.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.22 : 28,491.92 = 11,214.78 : x
  2. Step 2: Convert to fraction form
    20,646.22/28,491.92 = 11,214.78/x
  3. Step 3: Cross multiply
    20,646.22x = 28,491.92 × 11,214.78
  4. Step 4: Simplify right side
    20,646.22x = 319,530,614.58
  5. Step 5: Solve for x
    x = 319,530,614.58/20,646.22
  6. Step 6: Final answer
    x = 15,476.47

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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.