Home / 21,986.61-32,981.87-6,191.78

Finding the Fourth Proportional to 21,986.61, 32,981.87 and 6,191.78

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Solution

The fourth proportional to 21,986.61, 32,981.87 and 6,191.78 is: 9,288.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.61 : 32,981.87 = 6,191.78 : x
  2. Step 2: Convert to fraction form
    21,986.61/32,981.87 = 6,191.78/x
  3. Step 3: Cross multiply
    21,986.61x = 32,981.87 × 6,191.78
  4. Step 4: Simplify right side
    21,986.61x = 204,216,452.07
  5. Step 5: Solve for x
    x = 204,216,452.07/21,986.61
  6. Step 6: Final answer
    x = 9,288.22

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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.