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Finding the Fourth Proportional to 21,971.67, 32,963.13 and 6,389.30

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Solution

The fourth proportional to 21,971.67, 32,963.13 and 6,389.30 is: 9,585.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.67 : 32,963.13 = 6,389.30 : x
  2. Step 2: Convert to fraction form
    21,971.67/32,963.13 = 6,389.30/x
  3. Step 3: Cross multiply
    21,971.67x = 32,963.13 × 6,389.30
  4. Step 4: Simplify right side
    21,971.67x = 210,611,205.53
  5. Step 5: Solve for x
    x = 210,611,205.53/21,971.67
  6. Step 6: Final answer
    x = 9,585.58

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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.