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Finding the Fourth Proportional to 8,612.53, 12,920.01 and 2,767.18

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Solution

The fourth proportional to 8,612.53, 12,920.01 and 2,767.18 is: 4,151.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.53 : 12,920.01 = 2,767.18 : x
  2. Step 2: Convert to fraction form
    8,612.53/12,920.01 = 2,767.18/x
  3. Step 3: Cross multiply
    8,612.53x = 12,920.01 × 2,767.18
  4. Step 4: Simplify right side
    8,612.53x = 35,751,993.27
  5. Step 5: Solve for x
    x = 35,751,993.27/8,612.53
  6. Step 6: Final answer
    x = 4,151.16

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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.