Home / 18,789.15-28,186.44-5,642.55

Finding the Fourth Proportional to 18,789.15, 28,186.44 and 5,642.55

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Solution

The fourth proportional to 18,789.15, 28,186.44 and 5,642.55 is: 8,464.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.15 : 28,186.44 = 5,642.55 : x
  2. Step 2: Convert to fraction form
    18,789.15/28,186.44 = 5,642.55/x
  3. Step 3: Cross multiply
    18,789.15x = 28,186.44 × 5,642.55
  4. Step 4: Simplify right side
    18,789.15x = 159,043,397.02
  5. Step 5: Solve for x
    x = 159,043,397.02/18,789.15
  6. Step 6: Final answer
    x = 8,464.64

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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.