Home / 8,669.30-13,000.55-3,121.20

Finding the Fourth Proportional to 8,669.30, 13,000.55 and 3,121.20

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Solution

The fourth proportional to 8,669.30, 13,000.55 and 3,121.20 is: 4,680.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669.30 : 13,000.55 = 3,121.20 : x
  2. Step 2: Convert to fraction form
    8,669.30/13,000.55 = 3,121.20/x
  3. Step 3: Cross multiply
    8,669.30x = 13,000.55 × 3,121.20
  4. Step 4: Simplify right side
    8,669.30x = 40,577,301.05
  5. Step 5: Solve for x
    x = 40,577,301.05/8,669.30
  6. Step 6: Final answer
    x = 4,680.58

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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.