Home / 8,821.41-13,214.81-5,115.85

Finding the Fourth Proportional to 8,821.41, 13,214.81 and 5,115.85

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Solution

The fourth proportional to 8,821.41, 13,214.81 and 5,115.85 is: 7,663.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821.41 : 13,214.81 = 5,115.85 : x
  2. Step 2: Convert to fraction form
    8,821.41/13,214.81 = 5,115.85/x
  3. Step 3: Cross multiply
    8,821.41x = 13,214.81 × 5,115.85
  4. Step 4: Simplify right side
    8,821.41x = 67,604,972.95
  5. Step 5: Solve for x
    x = 67,604,972.95/8,821.41
  6. Step 6: Final answer
    x = 7,663.74

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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.