Home / 8,718.36-13,083.30-5,205.78

Finding the Fourth Proportional to 8,718.36, 13,083.30 and 5,205.78

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Solution

The fourth proportional to 8,718.36, 13,083.30 and 5,205.78 is: 7,812.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.36 : 13,083.30 = 5,205.78 : x
  2. Step 2: Convert to fraction form
    8,718.36/13,083.30 = 5,205.78/x
  3. Step 3: Cross multiply
    8,718.36x = 13,083.30 × 5,205.78
  4. Step 4: Simplify right side
    8,718.36x = 68,108,781.47
  5. Step 5: Solve for x
    x = 68,108,781.47/8,718.36
  6. Step 6: Final answer
    x = 7,812.11

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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.