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Finding the Fourth Proportional to 12,620.81, 17,416.54 and 7,243.14

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Solution

The fourth proportional to 12,620.81, 17,416.54 and 7,243.14 is: 9,995.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.81 : 17,416.54 = 7,243.14 : x
  2. Step 2: Convert to fraction form
    12,620.81/17,416.54 = 7,243.14/x
  3. Step 3: Cross multiply
    12,620.81x = 17,416.54 × 7,243.14
  4. Step 4: Simplify right side
    12,620.81x = 126,150,373.19
  5. Step 5: Solve for x
    x = 126,150,373.19/12,620.81
  6. Step 6: Final answer
    x = 9,995.42

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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.