Home / 12,587.21-18,879.60-3,822.20

Finding the Fourth Proportional to 12,587.21, 18,879.60 and 3,822.20

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Solution

The fourth proportional to 12,587.21, 18,879.60 and 3,822.20 is: 5,732.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.21 : 18,879.60 = 3,822.20 : x
  2. Step 2: Convert to fraction form
    12,587.21/18,879.60 = 3,822.20/x
  3. Step 3: Cross multiply
    12,587.21x = 18,879.60 × 3,822.20
  4. Step 4: Simplify right side
    12,587.21x = 72,161,616.39
  5. Step 5: Solve for x
    x = 72,161,616.39/12,587.21
  6. Step 6: Final answer
    x = 5,732.93

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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.