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Finding the Fourth Proportional to 10,669.60, 16,018.80 and 6,781.60

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Solution

The fourth proportional to 10,669.60, 16,018.80 and 6,781.60 is: 10,181.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,669.60 : 16,018.80 = 6,781.60 : x
  2. Step 2: Convert to fraction form
    10,669.60/16,018.80 = 6,781.60/x
  3. Step 3: Cross multiply
    10,669.60x = 16,018.80 × 6,781.60
  4. Step 4: Simplify right side
    10,669.60x = 108,633,094.08
  5. Step 5: Solve for x
    x = 108,633,094.08/10,669.60
  6. Step 6: Final answer
    x = 10,181.55

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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.