Home / 8,117.40-12,171.15-3,181.35

Finding the Fourth Proportional to 8,117.40, 12,171.15 and 3,181.35

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Solution

The fourth proportional to 8,117.40, 12,171.15 and 3,181.35 is: 4,770.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,117.40 : 12,171.15 = 3,181.35 : x
  2. Step 2: Convert to fraction form
    8,117.40/12,171.15 = 3,181.35/x
  3. Step 3: Cross multiply
    8,117.40x = 12,171.15 × 3,181.35
  4. Step 4: Simplify right side
    8,117.40x = 38,720,688.05
  5. Step 5: Solve for x
    x = 38,720,688.05/8,117.40
  6. Step 6: Final answer
    x = 4,770.09

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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.