Home / 42,378.87-63,571.35-11,213.75

Finding the Fourth Proportional to 42,378.87, 63,571.35 and 11,213.75

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Solution

The fourth proportional to 42,378.87, 63,571.35 and 11,213.75 is: 16,821.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,378.87 : 63,571.35 = 11,213.75 : x
  2. Step 2: Convert to fraction form
    42,378.87/63,571.35 = 11,213.75/x
  3. Step 3: Cross multiply
    42,378.87x = 63,571.35 × 11,213.75
  4. Step 4: Simplify right side
    42,378.87x = 712,873,169.99
  5. Step 5: Solve for x
    x = 712,873,169.99/42,378.87
  6. Step 6: Final answer
    x = 16,821.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.