Home / 8,121.40-12,167.70-5,039.80

Finding the Fourth Proportional to 8,121.40, 12,167.70 and 5,039.80

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Solution

The fourth proportional to 8,121.40, 12,167.70 and 5,039.80 is: 7,550.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.40 : 12,167.70 = 5,039.80 : x
  2. Step 2: Convert to fraction form
    8,121.40/12,167.70 = 5,039.80/x
  3. Step 3: Cross multiply
    8,121.40x = 12,167.70 × 5,039.80
  4. Step 4: Simplify right side
    8,121.40x = 61,322,774.46
  5. Step 5: Solve for x
    x = 61,322,774.46/8,121.40
  6. Step 6: Final answer
    x = 7,550.76

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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.