Home / 30,571.90-42,198.11-19,816.45

Finding the Fourth Proportional to 30,571.90, 42,198.11 and 19,816.45

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Solution

The fourth proportional to 30,571.90, 42,198.11 and 19,816.45 is: 27,352.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,571.90 : 42,198.11 = 19,816.45 : x
  2. Step 2: Convert to fraction form
    30,571.90/42,198.11 = 19,816.45/x
  3. Step 3: Cross multiply
    30,571.90x = 42,198.11 × 19,816.45
  4. Step 4: Simplify right side
    30,571.90x = 836,216,736.91
  5. Step 5: Solve for x
    x = 836,216,736.91/30,571.90
  6. Step 6: Final answer
    x = 27,352.46

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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.