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Finding the Fourth Proportional to 11,408.62, 15,743.92 and 6,440.62

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Solution

The fourth proportional to 11,408.62, 15,743.92 and 6,440.62 is: 8,888.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,408.62 : 15,743.92 = 6,440.62 : x
  2. Step 2: Convert to fraction form
    11,408.62/15,743.92 = 6,440.62/x
  3. Step 3: Cross multiply
    11,408.62x = 15,743.92 × 6,440.62
  4. Step 4: Simplify right side
    11,408.62x = 101,400,606.03
  5. Step 5: Solve for x
    x = 101,400,606.03/11,408.62
  6. Step 6: Final answer
    x = 8,888.07

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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.