Home / 8,211.72-12,318.12-2,946.18

Finding the Fourth Proportional to 8,211.72, 12,318.12 and 2,946.18

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Solution

The fourth proportional to 8,211.72, 12,318.12 and 2,946.18 is: 4,419.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211.72 : 12,318.12 = 2,946.18 : x
  2. Step 2: Convert to fraction form
    8,211.72/12,318.12 = 2,946.18/x
  3. Step 3: Cross multiply
    8,211.72x = 12,318.12 × 2,946.18
  4. Step 4: Simplify right side
    8,211.72x = 36,291,398.78
  5. Step 5: Solve for x
    x = 36,291,398.78/8,211.72
  6. Step 6: Final answer
    x = 4,419.46

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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.