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Finding the Fourth Proportional to 8,145.91, 11,238.78 and 4,787.65

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Solution

The fourth proportional to 8,145.91, 11,238.78 and 4,787.65 is: 6,605.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.91 : 11,238.78 = 4,787.65 : x
  2. Step 2: Convert to fraction form
    8,145.91/11,238.78 = 4,787.65/x
  3. Step 3: Cross multiply
    8,145.91x = 11,238.78 × 4,787.65
  4. Step 4: Simplify right side
    8,145.91x = 53,807,345.07
  5. Step 5: Solve for x
    x = 53,807,345.07/8,145.91
  6. Step 6: Final answer
    x = 6,605.44

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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.