Home / 28,078.66-38,744.14-16,139.76

Finding the Fourth Proportional to 28,078.66, 38,744.14 and 16,139.76

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Solution

The fourth proportional to 28,078.66, 38,744.14 and 16,139.76 is: 22,270.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.66 : 38,744.14 = 16,139.76 : x
  2. Step 2: Convert to fraction form
    28,078.66/38,744.14 = 16,139.76/x
  3. Step 3: Cross multiply
    28,078.66x = 38,744.14 × 16,139.76
  4. Step 4: Simplify right side
    28,078.66x = 625,321,121.01
  5. Step 5: Solve for x
    x = 625,321,121.01/28,078.66
  6. Step 6: Final answer
    x = 22,270.33

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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.