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Finding the Fourth Proportional to 13,415.06, 20,159.04 and 7,179.68

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Solution

The fourth proportional to 13,415.06, 20,159.04 and 7,179.68 is: 10,789.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.06 : 20,159.04 = 7,179.68 : x
  2. Step 2: Convert to fraction form
    13,415.06/20,159.04 = 7,179.68/x
  3. Step 3: Cross multiply
    13,415.06x = 20,159.04 × 7,179.68
  4. Step 4: Simplify right side
    13,415.06x = 144,735,456.31
  5. Step 5: Solve for x
    x = 144,735,456.31/13,415.06
  6. Step 6: Final answer
    x = 10,789.03

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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.