Home / 21,720.66-32,583.57-7,677.79

Finding the Fourth Proportional to 21,720.66, 32,583.57 and 7,677.79

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Solution

The fourth proportional to 21,720.66, 32,583.57 and 7,677.79 is: 11,517.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.66 : 32,583.57 = 7,677.79 : x
  2. Step 2: Convert to fraction form
    21,720.66/32,583.57 = 7,677.79/x
  3. Step 3: Cross multiply
    21,720.66x = 32,583.57 × 7,677.79
  4. Step 4: Simplify right side
    21,720.66x = 250,169,697.66
  5. Step 5: Solve for x
    x = 250,169,697.66/21,720.66
  6. Step 6: Final answer
    x = 11,517.59

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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.