Home / 20,889.92-31,188.08-15,933.12

Finding the Fourth Proportional to 20,889.92, 31,188.08 and 15,933.12

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Solution

The fourth proportional to 20,889.92, 31,188.08 and 15,933.12 is: 23,787.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.92 : 31,188.08 = 15,933.12 : x
  2. Step 2: Convert to fraction form
    20,889.92/31,188.08 = 15,933.12/x
  3. Step 3: Cross multiply
    20,889.92x = 31,188.08 × 15,933.12
  4. Step 4: Simplify right side
    20,889.92x = 496,923,421.21
  5. Step 5: Solve for x
    x = 496,923,421.21/20,889.92
  6. Step 6: Final answer
    x = 23,787.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.