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Finding the Fourth Proportional to 13,511, 20,168.72 and 11,673.92

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Solution

The fourth proportional to 13,511, 20,168.72 and 11,673.92 is: 17,426.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511 : 20,168.72 = 11,673.92 : x
  2. Step 2: Convert to fraction form
    13,511/20,168.72 = 11,673.92/x
  3. Step 3: Cross multiply
    13,511x = 20,168.72 × 11,673.92
  4. Step 4: Simplify right side
    13,511x = 235,448,023.78
  5. Step 5: Solve for x
    x = 235,448,023.78/13,511
  6. Step 6: Final answer
    x = 17,426.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.