Home / 12,219.87-16,859.55-7,182.48

Finding the Fourth Proportional to 12,219.87, 16,859.55 and 7,182.48

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Solution

The fourth proportional to 12,219.87, 16,859.55 and 7,182.48 is: 9,909.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.87 : 16,859.55 = 7,182.48 : x
  2. Step 2: Convert to fraction form
    12,219.87/16,859.55 = 7,182.48/x
  3. Step 3: Cross multiply
    12,219.87x = 16,859.55 × 7,182.48
  4. Step 4: Simplify right side
    12,219.87x = 121,093,380.68
  5. Step 5: Solve for x
    x = 121,093,380.68/12,219.87
  6. Step 6: Final answer
    x = 9,909.55

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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.