Home / 18,965.40-28,451.22-8,439.06

Finding the Fourth Proportional to 18,965.40, 28,451.22 and 8,439.06

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Solution

The fourth proportional to 18,965.40, 28,451.22 and 8,439.06 is: 12,659.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.40 : 28,451.22 = 8,439.06 : x
  2. Step 2: Convert to fraction form
    18,965.40/28,451.22 = 8,439.06/x
  3. Step 3: Cross multiply
    18,965.40x = 28,451.22 × 8,439.06
  4. Step 4: Simplify right side
    18,965.40x = 240,101,552.65
  5. Step 5: Solve for x
    x = 240,101,552.65/18,965.40
  6. Step 6: Final answer
    x = 12,659.98

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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.