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Finding the Fourth Proportional to 14,978.07, 20,670.66 and 8,606.70

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Solution

The fourth proportional to 14,978.07, 20,670.66 and 8,606.70 is: 11,877.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978.07 : 20,670.66 = 8,606.70 : x
  2. Step 2: Convert to fraction form
    14,978.07/20,670.66 = 8,606.70/x
  3. Step 3: Cross multiply
    14,978.07x = 20,670.66 × 8,606.70
  4. Step 4: Simplify right side
    14,978.07x = 177,906,169.42
  5. Step 5: Solve for x
    x = 177,906,169.42/14,978.07
  6. Step 6: Final answer
    x = 11,877.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.