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Finding the Fourth Proportional to 12,628.83, 18,918.99 and 7,065.31

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Solution

The fourth proportional to 12,628.83, 18,918.99 and 7,065.31 is: 10,584.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.83 : 18,918.99 = 7,065.31 : x
  2. Step 2: Convert to fraction form
    12,628.83/18,918.99 = 7,065.31/x
  3. Step 3: Cross multiply
    12,628.83x = 18,918.99 × 7,065.31
  4. Step 4: Simplify right side
    12,628.83x = 133,668,529.24
  5. Step 5: Solve for x
    x = 133,668,529.24/12,628.83
  6. Step 6: Final answer
    x = 10,584.40

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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.