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Finding the Fourth Proportional to 8,143.41, 11,238.15 and 5,721.10

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Solution

The fourth proportional to 8,143.41, 11,238.15 and 5,721.10 is: 7,895.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,143.41 : 11,238.15 = 5,721.10 : x
  2. Step 2: Convert to fraction form
    8,143.41/11,238.15 = 5,721.10/x
  3. Step 3: Cross multiply
    8,143.41x = 11,238.15 × 5,721.10
  4. Step 4: Simplify right side
    8,143.41x = 64,294,579.97
  5. Step 5: Solve for x
    x = 64,294,579.97/8,143.41
  6. Step 6: Final answer
    x = 7,895.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.