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Finding the Fourth Proportional to 6,387.74, 8,815.50 and 3,555.08

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Solution

The fourth proportional to 6,387.74, 8,815.50 and 3,555.08 is: 4,906.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.74 : 8,815.50 = 3,555.08 : x
  2. Step 2: Convert to fraction form
    6,387.74/8,815.50 = 3,555.08/x
  3. Step 3: Cross multiply
    6,387.74x = 8,815.50 × 3,555.08
  4. Step 4: Simplify right side
    6,387.74x = 31,339,812.18
  5. Step 5: Solve for x
    x = 31,339,812.18/6,387.74
  6. Step 6: Final answer
    x = 4,906.25

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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.