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Finding the Fourth Proportional to 13,129.80, 19,694.70 and 6,109.80

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Solution

The fourth proportional to 13,129.80, 19,694.70 and 6,109.80 is: 9,164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.80 : 19,694.70 = 6,109.80 : x
  2. Step 2: Convert to fraction form
    13,129.80/19,694.70 = 6,109.80/x
  3. Step 3: Cross multiply
    13,129.80x = 19,694.70 × 6,109.80
  4. Step 4: Simplify right side
    13,129.80x = 120,330,678.06
  5. Step 5: Solve for x
    x = 120,330,678.06/13,129.80
  6. Step 6: Final answer
    x = 9,164.70

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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.