Home / 21,821.87-32,702.30-11,805

Finding the Fourth Proportional to 21,821.87, 32,702.30 and 11,805

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Solution

The fourth proportional to 21,821.87, 32,702.30 and 11,805 is: 17,691.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.87 : 32,702.30 = 11,805 : x
  2. Step 2: Convert to fraction form
    21,821.87/32,702.30 = 11,805/x
  3. Step 3: Cross multiply
    21,821.87x = 32,702.30 × 11,805
  4. Step 4: Simplify right side
    21,821.87x = 386,050,651.50
  5. Step 5: Solve for x
    x = 386,050,651.50/21,821.87
  6. Step 6: Final answer
    x = 17,691.00

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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.