Home / 28,426.32-39,181.32-18,991.44

Finding the Fourth Proportional to 28,426.32, 39,181.32 and 18,991.44

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Solution

The fourth proportional to 28,426.32, 39,181.32 and 18,991.44 is: 26,176.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.32 : 39,181.32 = 18,991.44 : x
  2. Step 2: Convert to fraction form
    28,426.32/39,181.32 = 18,991.44/x
  3. Step 3: Cross multiply
    28,426.32x = 39,181.32 × 18,991.44
  4. Step 4: Simplify right side
    28,426.32x = 744,109,687.90
  5. Step 5: Solve for x
    x = 744,109,687.90/28,426.32
  6. Step 6: Final answer
    x = 26,176.79

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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.