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Finding the Fourth Proportional to 8,991.39, 13,478.37 and 3,440.46

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Solution

The fourth proportional to 8,991.39, 13,478.37 and 3,440.46 is: 5,157.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.39 : 13,478.37 = 3,440.46 : x
  2. Step 2: Convert to fraction form
    8,991.39/13,478.37 = 3,440.46/x
  3. Step 3: Cross multiply
    8,991.39x = 13,478.37 × 3,440.46
  4. Step 4: Simplify right side
    8,991.39x = 46,371,792.85
  5. Step 5: Solve for x
    x = 46,371,792.85/8,991.39
  6. Step 6: Final answer
    x = 5,157.36

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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.