Home / 30,949.43-42,720.38-18,202.05

Finding the Fourth Proportional to 30,949.43, 42,720.38 and 18,202.05

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Solution

The fourth proportional to 30,949.43, 42,720.38 and 18,202.05 is: 25,124.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,949.43 : 42,720.38 = 18,202.05 : x
  2. Step 2: Convert to fraction form
    30,949.43/42,720.38 = 18,202.05/x
  3. Step 3: Cross multiply
    30,949.43x = 42,720.38 × 18,202.05
  4. Step 4: Simplify right side
    30,949.43x = 777,598,492.78
  5. Step 5: Solve for x
    x = 777,598,492.78/30,949.43
  6. Step 6: Final answer
    x = 25,124.81

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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.