Home / 21,170.88-31,756.32-8,697.69

Finding the Fourth Proportional to 21,170.88, 31,756.32 and 8,697.69

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Solution

The fourth proportional to 21,170.88, 31,756.32 and 8,697.69 is: 13,046.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.88 : 31,756.32 = 8,697.69 : x
  2. Step 2: Convert to fraction form
    21,170.88/31,756.32 = 8,697.69/x
  3. Step 3: Cross multiply
    21,170.88x = 31,756.32 × 8,697.69
  4. Step 4: Simplify right side
    21,170.88x = 276,206,626.90
  5. Step 5: Solve for x
    x = 276,206,626.90/21,170.88
  6. Step 6: Final answer
    x = 13,046.54

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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.