Home / 30,738.40-42,419.46-18,799.20

Finding the Fourth Proportional to 30,738.40, 42,419.46 and 18,799.20

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Solution

The fourth proportional to 30,738.40, 42,419.46 and 18,799.20 is: 25,943.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,738.40 : 42,419.46 = 18,799.20 : x
  2. Step 2: Convert to fraction form
    30,738.40/42,419.46 = 18,799.20/x
  3. Step 3: Cross multiply
    30,738.40x = 42,419.46 × 18,799.20
  4. Step 4: Simplify right side
    30,738.40x = 797,451,912.43
  5. Step 5: Solve for x
    x = 797,451,912.43/30,738.40
  6. Step 6: Final answer
    x = 25,943.18

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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.