Home / 20,911.98-31,367.76-5,329.44

Finding the Fourth Proportional to 20,911.98, 31,367.76 and 5,329.44

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Solution

The fourth proportional to 20,911.98, 31,367.76 and 5,329.44 is: 7,994.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.98 : 31,367.76 = 5,329.44 : x
  2. Step 2: Convert to fraction form
    20,911.98/31,367.76 = 5,329.44/x
  3. Step 3: Cross multiply
    20,911.98x = 31,367.76 × 5,329.44
  4. Step 4: Simplify right side
    20,911.98x = 167,172,594.85
  5. Step 5: Solve for x
    x = 167,172,594.85/20,911.98
  6. Step 6: Final answer
    x = 7,994.11

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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.