Home / 21,826.87-30,120.28-13,343.20

Finding the Fourth Proportional to 21,826.87, 30,120.28 and 13,343.20

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Solution

The fourth proportional to 21,826.87, 30,120.28 and 13,343.20 is: 18,413.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,826.87 : 30,120.28 = 13,343.20 : x
  2. Step 2: Convert to fraction form
    21,826.87/30,120.28 = 13,343.20/x
  3. Step 3: Cross multiply
    21,826.87x = 30,120.28 × 13,343.20
  4. Step 4: Simplify right side
    21,826.87x = 401,900,702.78
  5. Step 5: Solve for x
    x = 401,900,702.78/21,826.87
  6. Step 6: Final answer
    x = 18,413.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.