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Finding the Fourth Proportional to 21,990.84, 32,986.28 and 5,350.87

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Solution

The fourth proportional to 21,990.84, 32,986.28 and 5,350.87 is: 8,026.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.84 : 32,986.28 = 5,350.87 : x
  2. Step 2: Convert to fraction form
    21,990.84/32,986.28 = 5,350.87/x
  3. Step 3: Cross multiply
    21,990.84x = 32,986.28 × 5,350.87
  4. Step 4: Simplify right side
    21,990.84x = 176,505,350.67
  5. Step 5: Solve for x
    x = 176,505,350.67/21,990.84
  6. Step 6: Final answer
    x = 8,026.31

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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.