Home / 18,919.12-28,364.82-6,435.78

Finding the Fourth Proportional to 18,919.12, 28,364.82 and 6,435.78

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Solution

The fourth proportional to 18,919.12, 28,364.82 and 6,435.78 is: 9,648.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.12 : 28,364.82 = 6,435.78 : x
  2. Step 2: Convert to fraction form
    18,919.12/28,364.82 = 6,435.78/x
  3. Step 3: Cross multiply
    18,919.12x = 28,364.82 × 6,435.78
  4. Step 4: Simplify right side
    18,919.12x = 182,549,741.26
  5. Step 5: Solve for x
    x = 182,549,741.26/18,919.12
  6. Step 6: Final answer
    x = 9,648.96

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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.