Home / 8,220.69-12,335.18-3,291.75

Finding the Fourth Proportional to 8,220.69, 12,335.18 and 3,291.75

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Solution

The fourth proportional to 8,220.69, 12,335.18 and 3,291.75 is: 4,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.69 : 12,335.18 = 3,291.75 : x
  2. Step 2: Convert to fraction form
    8,220.69/12,335.18 = 3,291.75/x
  3. Step 3: Cross multiply
    8,220.69x = 12,335.18 × 3,291.75
  4. Step 4: Simplify right side
    8,220.69x = 40,604,312.31
  5. Step 5: Solve for x
    x = 40,604,312.31/8,220.69
  6. Step 6: Final answer
    x = 4,939.28

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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.