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Finding the Fourth Proportional to 12,835.92, 17,672.40 and 11,179.20

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Solution

The fourth proportional to 12,835.92, 17,672.40 and 11,179.20 is: 15,391.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,835.92 : 17,672.40 = 11,179.20 : x
  2. Step 2: Convert to fraction form
    12,835.92/17,672.40 = 11,179.20/x
  3. Step 3: Cross multiply
    12,835.92x = 17,672.40 × 11,179.20
  4. Step 4: Simplify right side
    12,835.92x = 197,563,294.08
  5. Step 5: Solve for x
    x = 197,563,294.08/12,835.92
  6. Step 6: Final answer
    x = 15,391.44

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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.