Home / 25,425.92-38,035.20-21,278.72

Finding the Fourth Proportional to 25,425.92, 38,035.20 and 21,278.72

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Solution

The fourth proportional to 25,425.92, 38,035.20 and 21,278.72 is: 31,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,425.92 : 38,035.20 = 21,278.72 : x
  2. Step 2: Convert to fraction form
    25,425.92/38,035.20 = 21,278.72/x
  3. Step 3: Cross multiply
    25,425.92x = 38,035.20 × 21,278.72
  4. Step 4: Simplify right side
    25,425.92x = 809,340,370.94
  5. Step 5: Solve for x
    x = 809,340,370.94/25,425.92
  6. Step 6: Final answer
    x = 31,831.31

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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.