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Finding the Fourth Proportional to 12,620.91, 18,907.08 and 7,057.38

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Solution

The fourth proportional to 12,620.91, 18,907.08 and 7,057.38 is: 10,572.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.91 : 18,907.08 = 7,057.38 : x
  2. Step 2: Convert to fraction form
    12,620.91/18,907.08 = 7,057.38/x
  3. Step 3: Cross multiply
    12,620.91x = 18,907.08 × 7,057.38
  4. Step 4: Simplify right side
    12,620.91x = 133,434,448.25
  5. Step 5: Solve for x
    x = 133,434,448.25/12,620.91
  6. Step 6: Final answer
    x = 10,572.49

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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.