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Finding the Fourth Proportional to 12,391.14, 18,574.86 and 7,935.12

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Solution

The fourth proportional to 12,391.14, 18,574.86 and 7,935.12 is: 11,895.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.14 : 18,574.86 = 7,935.12 : x
  2. Step 2: Convert to fraction form
    12,391.14/18,574.86 = 7,935.12/x
  3. Step 3: Cross multiply
    12,391.14x = 18,574.86 × 7,935.12
  4. Step 4: Simplify right side
    12,391.14x = 147,393,743.08
  5. Step 5: Solve for x
    x = 147,393,743.08/12,391.14
  6. Step 6: Final answer
    x = 11,895.09

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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.