Home / 18,687.44-28,039.32-9,920.24

Finding the Fourth Proportional to 18,687.44, 28,039.32 and 9,920.24

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Solution

The fourth proportional to 18,687.44, 28,039.32 and 9,920.24 is: 14,884.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.44 : 28,039.32 = 9,920.24 : x
  2. Step 2: Convert to fraction form
    18,687.44/28,039.32 = 9,920.24/x
  3. Step 3: Cross multiply
    18,687.44x = 28,039.32 × 9,920.24
  4. Step 4: Simplify right side
    18,687.44x = 278,156,783.84
  5. Step 5: Solve for x
    x = 278,156,783.84/18,687.44
  6. Step 6: Final answer
    x = 14,884.69

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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.