Home / 20,960.52-31,440.80-5,165.55

Finding the Fourth Proportional to 20,960.52, 31,440.80 and 5,165.55

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Solution

The fourth proportional to 20,960.52, 31,440.80 and 5,165.55 is: 7,748.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.52 : 31,440.80 = 5,165.55 : x
  2. Step 2: Convert to fraction form
    20,960.52/31,440.80 = 5,165.55/x
  3. Step 3: Cross multiply
    20,960.52x = 31,440.80 × 5,165.55
  4. Step 4: Simplify right side
    20,960.52x = 162,409,024.44
  5. Step 5: Solve for x
    x = 162,409,024.44/20,960.52
  6. Step 6: Final answer
    x = 7,748.33

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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.