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Finding the Fourth Proportional to 6,387.58, 8,815.32 and 3,555.19

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Solution

The fourth proportional to 6,387.58, 8,815.32 and 3,555.19 is: 4,906.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.58 : 8,815.32 = 3,555.19 : x
  2. Step 2: Convert to fraction form
    6,387.58/8,815.32 = 3,555.19/x
  3. Step 3: Cross multiply
    6,387.58x = 8,815.32 × 3,555.19
  4. Step 4: Simplify right side
    6,387.58x = 31,340,137.51
  5. Step 5: Solve for x
    x = 31,340,137.51/6,387.58
  6. Step 6: Final answer
    x = 4,906.42

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Half scale
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Double scale
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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.