Home / 21,277.68-31,912.29-20,223.87

Finding the Fourth Proportional to 21,277.68, 31,912.29 and 20,223.87

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Solution

The fourth proportional to 21,277.68, 31,912.29 and 20,223.87 is: 30,331.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.68 : 31,912.29 = 20,223.87 : x
  2. Step 2: Convert to fraction form
    21,277.68/31,912.29 = 20,223.87/x
  3. Step 3: Cross multiply
    21,277.68x = 31,912.29 × 20,223.87
  4. Step 4: Simplify right side
    21,277.68x = 645,390,004.36
  5. Step 5: Solve for x
    x = 645,390,004.36/21,277.68
  6. Step 6: Final answer
    x = 30,331.78

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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.