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Finding the Fourth Proportional to 6,386.16, 8,811.54 and 3,867.78

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Solution

The fourth proportional to 6,386.16, 8,811.54 and 3,867.78 is: 5,336.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.16 : 8,811.54 = 3,867.78 : x
  2. Step 2: Convert to fraction form
    6,386.16/8,811.54 = 3,867.78/x
  3. Step 3: Cross multiply
    6,386.16x = 8,811.54 × 3,867.78
  4. Step 4: Simplify right side
    6,386.16x = 34,081,098.18
  5. Step 5: Solve for x
    x = 34,081,098.18/6,386.16
  6. Step 6: Final answer
    x = 5,336.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.