Home / 30,571.10-42,191.63-20,361.56

Finding the Fourth Proportional to 30,571.10, 42,191.63 and 20,361.56

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Solution

The fourth proportional to 30,571.10, 42,191.63 and 20,361.56 is: 28,101.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,571.10 : 42,191.63 = 20,361.56 : x
  2. Step 2: Convert to fraction form
    30,571.10/42,191.63 = 20,361.56/x
  3. Step 3: Cross multiply
    30,571.10x = 42,191.63 × 20,361.56
  4. Step 4: Simplify right side
    30,571.10x = 859,087,349.39
  5. Step 5: Solve for x
    x = 859,087,349.39/30,571.10
  6. Step 6: Final answer
    x = 28,101.29

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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.