Home / 20,923.10-31,385.72-5,340.86

Finding the Fourth Proportional to 20,923.10, 31,385.72 and 5,340.86

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Solution

The fourth proportional to 20,923.10, 31,385.72 and 5,340.86 is: 8,011.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.10 : 31,385.72 = 5,340.86 : x
  2. Step 2: Convert to fraction form
    20,923.10/31,385.72 = 5,340.86/x
  3. Step 3: Cross multiply
    20,923.10x = 31,385.72 × 5,340.86
  4. Step 4: Simplify right side
    20,923.10x = 167,626,592.94
  5. Step 5: Solve for x
    x = 167,626,592.94/20,923.10
  6. Step 6: Final answer
    x = 8,011.56

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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.