Home / 20,960.59-31,440.89-5,378.21

Finding the Fourth Proportional to 20,960.59, 31,440.89 and 5,378.21

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Solution

The fourth proportional to 20,960.59, 31,440.89 and 5,378.21 is: 8,067.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.59 : 31,440.89 = 5,378.21 : x
  2. Step 2: Convert to fraction form
    20,960.59/31,440.89 = 5,378.21/x
  3. Step 3: Cross multiply
    20,960.59x = 31,440.89 × 5,378.21
  4. Step 4: Simplify right side
    20,960.59x = 169,095,709.01
  5. Step 5: Solve for x
    x = 169,095,709.01/20,960.59
  6. Step 6: Final answer
    x = 8,067.32

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1.5x scale

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.