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Finding the Fourth Proportional to 13,040.40, 17,991.96 and 8,504.40

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Solution

The fourth proportional to 13,040.40, 17,991.96 and 8,504.40 is: 11,733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,040.40 : 17,991.96 = 8,504.40 : x
  2. Step 2: Convert to fraction form
    13,040.40/17,991.96 = 8,504.40/x
  3. Step 3: Cross multiply
    13,040.40x = 17,991.96 × 8,504.40
  4. Step 4: Simplify right side
    13,040.40x = 153,010,824.62
  5. Step 5: Solve for x
    x = 153,010,824.62/13,040.40
  6. Step 6: Final answer
    x = 11,733.60

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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.