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Finding the Fourth Proportional to 11,888.05, 16,390.61 and 7,631.61

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Solution

The fourth proportional to 11,888.05, 16,390.61 and 7,631.61 is: 10,522.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,888.05 : 16,390.61 = 7,631.61 : x
  2. Step 2: Convert to fraction form
    11,888.05/16,390.61 = 7,631.61/x
  3. Step 3: Cross multiply
    11,888.05x = 16,390.61 × 7,631.61
  4. Step 4: Simplify right side
    11,888.05x = 125,086,743.18
  5. Step 5: Solve for x
    x = 125,086,743.18/11,888.05
  6. Step 6: Final answer
    x = 10,522.06

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1.5x scale

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.