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Finding the Fourth Proportional to 11,818.60, 17,711.70 and 9,631.60

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Solution

The fourth proportional to 11,818.60, 17,711.70 and 9,631.60 is: 14,434.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,818.60 : 17,711.70 = 9,631.60 : x
  2. Step 2: Convert to fraction form
    11,818.60/17,711.70 = 9,631.60/x
  3. Step 3: Cross multiply
    11,818.60x = 17,711.70 × 9,631.60
  4. Step 4: Simplify right side
    11,818.60x = 170,592,009.72
  5. Step 5: Solve for x
    x = 170,592,009.72/11,818.60
  6. Step 6: Final answer
    x = 14,434.20

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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.