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Finding the Fourth Proportional to 18,572.16, 27,868.98 and 7,479.84

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Solution

The fourth proportional to 18,572.16, 27,868.98 and 7,479.84 is: 11,224.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.16 : 27,868.98 = 7,479.84 : x
  2. Step 2: Convert to fraction form
    18,572.16/27,868.98 = 7,479.84/x
  3. Step 3: Cross multiply
    18,572.16x = 27,868.98 × 7,479.84
  4. Step 4: Simplify right side
    18,572.16x = 208,455,511.36
  5. Step 5: Solve for x
    x = 208,455,511.36/18,572.16
  6. Step 6: Final answer
    x = 11,224.09

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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.