Home / 8,249.77-12,378.91-5,478.36

Finding the Fourth Proportional to 8,249.77, 12,378.91 and 5,478.36

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Solution

The fourth proportional to 8,249.77, 12,378.91 and 5,478.36 is: 8,220.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,249.77 : 12,378.91 = 5,478.36 : x
  2. Step 2: Convert to fraction form
    8,249.77/12,378.91 = 5,478.36/x
  3. Step 3: Cross multiply
    8,249.77x = 12,378.91 × 5,478.36
  4. Step 4: Simplify right side
    8,249.77x = 67,816,125.39
  5. Step 5: Solve for x
    x = 67,816,125.39/8,249.77
  6. Step 6: Final answer
    x = 8,220.37

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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.