Home / 30,996.36-42,761.78-18,414.28

Finding the Fourth Proportional to 30,996.36, 42,761.78 and 18,414.28

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Solution

The fourth proportional to 30,996.36, 42,761.78 and 18,414.28 is: 25,403.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,996.36 : 42,761.78 = 18,414.28 : x
  2. Step 2: Convert to fraction form
    30,996.36/42,761.78 = 18,414.28/x
  3. Step 3: Cross multiply
    30,996.36x = 42,761.78 × 18,414.28
  4. Step 4: Simplify right side
    30,996.36x = 787,427,390.22
  5. Step 5: Solve for x
    x = 787,427,390.22/30,996.36
  6. Step 6: Final answer
    x = 25,403.87

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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.