Home / 19,785.78-27,307.44-11,287.92

Finding the Fourth Proportional to 19,785.78, 27,307.44 and 11,287.92

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Solution

The fourth proportional to 19,785.78, 27,307.44 and 11,287.92 is: 15,579.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,785.78 : 27,307.44 = 11,287.92 : x
  2. Step 2: Convert to fraction form
    19,785.78/27,307.44 = 11,287.92/x
  3. Step 3: Cross multiply
    19,785.78x = 27,307.44 × 11,287.92
  4. Step 4: Simplify right side
    19,785.78x = 308,244,198.12
  5. Step 5: Solve for x
    x = 308,244,198.12/19,785.78
  6. Step 6: Final answer
    x = 15,579.08

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1.5x scale

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.