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Finding the Fourth Proportional to 21,812.68, 32,718.66 and 5,396.68

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Solution

The fourth proportional to 21,812.68, 32,718.66 and 5,396.68 is: 8,094.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.68 : 32,718.66 = 5,396.68 : x
  2. Step 2: Convert to fraction form
    21,812.68/32,718.66 = 5,396.68/x
  3. Step 3: Cross multiply
    21,812.68x = 32,718.66 × 5,396.68
  4. Step 4: Simplify right side
    21,812.68x = 176,572,138.05
  5. Step 5: Solve for x
    x = 176,572,138.05/21,812.68
  6. Step 6: Final answer
    x = 8,094.93

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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.