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Finding the Fourth Proportional to 12,628.59, 18,918.62 and 7,065.06

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Solution

The fourth proportional to 12,628.59, 18,918.62 and 7,065.06 is: 10,584.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.59 : 18,918.62 = 7,065.06 : x
  2. Step 2: Convert to fraction form
    12,628.59/18,918.62 = 7,065.06/x
  3. Step 3: Cross multiply
    12,628.59x = 18,918.62 × 7,065.06
  4. Step 4: Simplify right side
    12,628.59x = 133,661,105.64
  5. Step 5: Solve for x
    x = 133,661,105.64/12,628.59
  6. Step 6: Final answer
    x = 10,584.01

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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.