Home / 21,163.71-31,869.25-15,655.92

Finding the Fourth Proportional to 21,163.71, 31,869.25 and 15,655.92

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Solution

The fourth proportional to 21,163.71, 31,869.25 and 15,655.92 is: 23,575.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.71 : 31,869.25 = 15,655.92 : x
  2. Step 2: Convert to fraction form
    21,163.71/31,869.25 = 15,655.92/x
  3. Step 3: Cross multiply
    21,163.71x = 31,869.25 × 15,655.92
  4. Step 4: Simplify right side
    21,163.71x = 498,942,428.46
  5. Step 5: Solve for x
    x = 498,942,428.46/21,163.71
  6. Step 6: Final answer
    x = 23,575.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.