Home / 20,708.79-28,578.17-11,277.39

Finding the Fourth Proportional to 20,708.79, 28,578.17 and 11,277.39

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Solution

The fourth proportional to 20,708.79, 28,578.17 and 11,277.39 is: 15,562.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.79 : 28,578.17 = 11,277.39 : x
  2. Step 2: Convert to fraction form
    20,708.79/28,578.17 = 11,277.39/x
  3. Step 3: Cross multiply
    20,708.79x = 28,578.17 × 11,277.39
  4. Step 4: Simplify right side
    20,708.79x = 322,287,168.58
  5. Step 5: Solve for x
    x = 322,287,168.58/20,708.79
  6. Step 6: Final answer
    x = 15,562.82

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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.