Home / 19,601.78-27,047.32-12,890.12

Finding the Fourth Proportional to 19,601.78, 27,047.32 and 12,890.12

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Solution

The fourth proportional to 19,601.78, 27,047.32 and 12,890.12 is: 17,786.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,601.78 : 27,047.32 = 12,890.12 : x
  2. Step 2: Convert to fraction form
    19,601.78/27,047.32 = 12,890.12/x
  3. Step 3: Cross multiply
    19,601.78x = 27,047.32 × 12,890.12
  4. Step 4: Simplify right side
    19,601.78x = 348,643,033.02
  5. Step 5: Solve for x
    x = 348,643,033.02/19,601.78
  6. Step 6: Final answer
    x = 17,786.30

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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.