Home / 8,081.21-12,122.45-2,158.11

Finding the Fourth Proportional to 8,081.21, 12,122.45 and 2,158.11

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Solution

The fourth proportional to 8,081.21, 12,122.45 and 2,158.11 is: 3,237.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.21 : 12,122.45 = 2,158.11 : x
  2. Step 2: Convert to fraction form
    8,081.21/12,122.45 = 2,158.11/x
  3. Step 3: Cross multiply
    8,081.21x = 12,122.45 × 2,158.11
  4. Step 4: Simplify right side
    8,081.21x = 26,161,569.78
  5. Step 5: Solve for x
    x = 26,161,569.78/8,081.21
  6. Step 6: Final answer
    x = 3,237.34

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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.