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Finding the Fourth Proportional to 18,967.74, 28,456.08 and 6,487.89

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Solution

The fourth proportional to 18,967.74, 28,456.08 and 6,487.89 is: 9,733.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.74 : 28,456.08 = 6,487.89 : x
  2. Step 2: Convert to fraction form
    18,967.74/28,456.08 = 6,487.89/x
  3. Step 3: Cross multiply
    18,967.74x = 28,456.08 × 6,487.89
  4. Step 4: Simplify right side
    18,967.74x = 184,619,916.87
  5. Step 5: Solve for x
    x = 184,619,916.87/18,967.74
  6. Step 6: Final answer
    x = 9,733.36

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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.