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Finding the Fourth Proportional to 11,877.38, 17,817.89 and 8,615.10

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Solution

The fourth proportional to 11,877.38, 17,817.89 and 8,615.10 is: 12,923.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,877.38 : 17,817.89 = 8,615.10 : x
  2. Step 2: Convert to fraction form
    11,877.38/17,817.89 = 8,615.10/x
  3. Step 3: Cross multiply
    11,877.38x = 17,817.89 × 8,615.10
  4. Step 4: Simplify right side
    11,877.38x = 153,502,861.06
  5. Step 5: Solve for x
    x = 153,502,861.06/11,877.38
  6. Step 6: Final answer
    x = 12,923.97

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1.5x scale

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.