Home / 8,072.20-11,139.78-4,885.80

Finding the Fourth Proportional to 8,072.20, 11,139.78 and 4,885.80

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Solution

The fourth proportional to 8,072.20, 11,139.78 and 4,885.80 is: 6,742.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,072.20 : 11,139.78 = 4,885.80 : x
  2. Step 2: Convert to fraction form
    8,072.20/11,139.78 = 4,885.80/x
  3. Step 3: Cross multiply
    8,072.20x = 11,139.78 × 4,885.80
  4. Step 4: Simplify right side
    8,072.20x = 54,426,737.12
  5. Step 5: Solve for x
    x = 54,426,737.12/8,072.20
  6. Step 6: Final answer
    x = 6,742.49

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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.