Home / 20,976.34-31,475.45-8,505.58

Finding the Fourth Proportional to 20,976.34, 31,475.45 and 8,505.58

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Solution

The fourth proportional to 20,976.34, 31,475.45 and 8,505.58 is: 12,762.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.34 : 31,475.45 = 8,505.58 : x
  2. Step 2: Convert to fraction form
    20,976.34/31,475.45 = 8,505.58/x
  3. Step 3: Cross multiply
    20,976.34x = 31,475.45 × 8,505.58
  4. Step 4: Simplify right side
    20,976.34x = 267,716,958.01
  5. Step 5: Solve for x
    x = 267,716,958.01/20,976.34
  6. Step 6: Final answer
    x = 12,762.81

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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.