Home / 8,839.77-12,200.85-6,921.78

Finding the Fourth Proportional to 8,839.77, 12,200.85 and 6,921.78

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Solution

The fourth proportional to 8,839.77, 12,200.85 and 6,921.78 is: 9,553.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,839.77 : 12,200.85 = 6,921.78 : x
  2. Step 2: Convert to fraction form
    8,839.77/12,200.85 = 6,921.78/x
  3. Step 3: Cross multiply
    8,839.77x = 12,200.85 × 6,921.78
  4. Step 4: Simplify right side
    8,839.77x = 84,451,599.51
  5. Step 5: Solve for x
    x = 84,451,599.51/8,839.77
  6. Step 6: Final answer
    x = 9,553.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.