Home / 30,882.89-42,622.17-20,139.26

Finding the Fourth Proportional to 30,882.89, 42,622.17 and 20,139.26

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Solution

The fourth proportional to 30,882.89, 42,622.17 and 20,139.26 is: 27,794.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,882.89 : 42,622.17 = 20,139.26 : x
  2. Step 2: Convert to fraction form
    30,882.89/42,622.17 = 20,139.26/x
  3. Step 3: Cross multiply
    30,882.89x = 42,622.17 × 20,139.26
  4. Step 4: Simplify right side
    30,882.89x = 858,378,649.59
  5. Step 5: Solve for x
    x = 858,378,649.59/30,882.89
  6. Step 6: Final answer
    x = 27,794.63

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1.5x scale

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.