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Finding the Fourth Proportional to 6,387.18, 8,809.98 and 3,867.54

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Solution

The fourth proportional to 6,387.18, 8,809.98 and 3,867.54 is: 5,334.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.18 : 8,809.98 = 3,867.54 : x
  2. Step 2: Convert to fraction form
    6,387.18/8,809.98 = 3,867.54/x
  3. Step 3: Cross multiply
    6,387.18x = 8,809.98 × 3,867.54
  4. Step 4: Simplify right side
    6,387.18x = 34,072,950.05
  5. Step 5: Solve for x
    x = 34,072,950.05/6,387.18
  6. Step 6: Final answer
    x = 5,334.58

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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.