Home / 8,680.34-13,010.66-3,990.66

Finding the Fourth Proportional to 8,680.34, 13,010.66 and 3,990.66

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Solution

The fourth proportional to 8,680.34, 13,010.66 and 3,990.66 is: 5,981.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.34 : 13,010.66 = 3,990.66 : x
  2. Step 2: Convert to fraction form
    8,680.34/13,010.66 = 3,990.66/x
  3. Step 3: Cross multiply
    8,680.34x = 13,010.66 × 3,990.66
  4. Step 4: Simplify right side
    8,680.34x = 51,921,162.29
  5. Step 5: Solve for x
    x = 51,921,162.29/8,680.34
  6. Step 6: Final answer
    x = 5,981.46

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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.