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Finding the Fourth Proportional to 13,811.13, 19,059.71 and 8,509.41

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Solution

The fourth proportional to 13,811.13, 19,059.71 and 8,509.41 is: 11,743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.13 : 19,059.71 = 8,509.41 : x
  2. Step 2: Convert to fraction form
    13,811.13/19,059.71 = 8,509.41/x
  3. Step 3: Cross multiply
    13,811.13x = 19,059.71 × 8,509.41
  4. Step 4: Simplify right side
    13,811.13x = 162,186,844.32
  5. Step 5: Solve for x
    x = 162,186,844.32/13,811.13
  6. Step 6: Final answer
    x = 11,743.20

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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.