Home / 20,928.24-31,385.88-7,074

Finding the Fourth Proportional to 20,928.24, 31,385.88 and 7,074

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Solution

The fourth proportional to 20,928.24, 31,385.88 and 7,074 is: 10,608.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.24 : 31,385.88 = 7,074 : x
  2. Step 2: Convert to fraction form
    20,928.24/31,385.88 = 7,074/x
  3. Step 3: Cross multiply
    20,928.24x = 31,385.88 × 7,074
  4. Step 4: Simplify right side
    20,928.24x = 222,023,715.12
  5. Step 5: Solve for x
    x = 222,023,715.12/20,928.24
  6. Step 6: Final answer
    x = 10,608.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.