Home / 8,721.72-13,083.10-2,878.38

Finding the Fourth Proportional to 8,721.72, 13,083.10 and 2,878.38

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Solution

The fourth proportional to 8,721.72, 13,083.10 and 2,878.38 is: 4,317.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.72 : 13,083.10 = 2,878.38 : x
  2. Step 2: Convert to fraction form
    8,721.72/13,083.10 = 2,878.38/x
  3. Step 3: Cross multiply
    8,721.72x = 13,083.10 × 2,878.38
  4. Step 4: Simplify right side
    8,721.72x = 37,658,133.38
  5. Step 5: Solve for x
    x = 37,658,133.38/8,721.72
  6. Step 6: Final answer
    x = 4,317.74

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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.