Home / 21,217.47-31,822.10-20,163.76

Finding the Fourth Proportional to 21,217.47, 31,822.10 and 20,163.76

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Solution

The fourth proportional to 21,217.47, 31,822.10 and 20,163.76 is: 30,241.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.47 : 31,822.10 = 20,163.76 : x
  2. Step 2: Convert to fraction form
    21,217.47/31,822.10 = 20,163.76/x
  3. Step 3: Cross multiply
    21,217.47x = 31,822.10 × 20,163.76
  4. Step 4: Simplify right side
    21,217.47x = 641,653,187.10
  5. Step 5: Solve for x
    x = 641,653,187.10/21,217.47
  6. Step 6: Final answer
    x = 30,241.74

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1.5x scale

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.