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Finding the Fourth Proportional to 18,479.56, 27,730.86 and 7,384.52

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Solution

The fourth proportional to 18,479.56, 27,730.86 and 7,384.52 is: 11,081.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.56 : 27,730.86 = 7,384.52 : x
  2. Step 2: Convert to fraction form
    18,479.56/27,730.86 = 7,384.52/x
  3. Step 3: Cross multiply
    18,479.56x = 27,730.86 × 7,384.52
  4. Step 4: Simplify right side
    18,479.56x = 204,779,090.29
  5. Step 5: Solve for x
    x = 204,779,090.29/18,479.56
  6. Step 6: Final answer
    x = 11,081.38

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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.