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Finding the Fourth Proportional to 9,393.71, 12,962.78 and 5,143.91

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Solution

The fourth proportional to 9,393.71, 12,962.78 and 5,143.91 is: 7,098.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,393.71 : 12,962.78 = 5,143.91 : x
  2. Step 2: Convert to fraction form
    9,393.71/12,962.78 = 5,143.91/x
  3. Step 3: Cross multiply
    9,393.71x = 12,962.78 × 5,143.91
  4. Step 4: Simplify right side
    9,393.71x = 66,679,283.14
  5. Step 5: Solve for x
    x = 66,679,283.14/9,393.71
  6. Step 6: Final answer
    x = 7,098.29

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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.