Home / 21,146.87-31,720.21-5,352.05

Finding the Fourth Proportional to 21,146.87, 31,720.21 and 5,352.05

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Solution

The fourth proportional to 21,146.87, 31,720.21 and 5,352.05 is: 8,028.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.87 : 31,720.21 = 5,352.05 : x
  2. Step 2: Convert to fraction form
    21,146.87/31,720.21 = 5,352.05/x
  3. Step 3: Cross multiply
    21,146.87x = 31,720.21 × 5,352.05
  4. Step 4: Simplify right side
    21,146.87x = 169,768,149.93
  5. Step 5: Solve for x
    x = 169,768,149.93/21,146.87
  6. Step 6: Final answer
    x = 8,028.05

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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.