Home / 20,440-28,206.96-11,489.02

Finding the Fourth Proportional to 20,440, 28,206.96 and 11,489.02

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Solution

The fourth proportional to 20,440, 28,206.96 and 11,489.02 is: 15,854.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440 : 28,206.96 = 11,489.02 : x
  2. Step 2: Convert to fraction form
    20,440/28,206.96 = 11,489.02/x
  3. Step 3: Cross multiply
    20,440x = 28,206.96 × 11,489.02
  4. Step 4: Simplify right side
    20,440x = 324,070,327.58
  5. Step 5: Solve for x
    x = 324,070,327.58/20,440
  6. Step 6: Final answer
    x = 15,854.71

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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.