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Finding the Fourth Proportional to 18,319.41, 27,479.04 and 7,787.79

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Solution

The fourth proportional to 18,319.41, 27,479.04 and 7,787.79 is: 11,681.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,319.41 : 27,479.04 = 7,787.79 : x
  2. Step 2: Convert to fraction form
    18,319.41/27,479.04 = 7,787.79/x
  3. Step 3: Cross multiply
    18,319.41x = 27,479.04 × 7,787.79
  4. Step 4: Simplify right side
    18,319.41x = 214,000,992.92
  5. Step 5: Solve for x
    x = 214,000,992.92/18,319.41
  6. Step 6: Final answer
    x = 11,681.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.