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Finding the Fourth Proportional to 21,912.64, 32,862 and 7,118.14

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Solution

The fourth proportional to 21,912.64, 32,862 and 7,118.14 is: 10,674.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.64 : 32,862 = 7,118.14 : x
  2. Step 2: Convert to fraction form
    21,912.64/32,862 = 7,118.14/x
  3. Step 3: Cross multiply
    21,912.64x = 32,862 × 7,118.14
  4. Step 4: Simplify right side
    21,912.64x = 233,916,316.68
  5. Step 5: Solve for x
    x = 233,916,316.68/21,912.64
  6. Step 6: Final answer
    x = 10,674.95

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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.