Home / 21,103.36-31,659.72-7,955.85

Finding the Fourth Proportional to 21,103.36, 31,659.72 and 7,955.85

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Solution

The fourth proportional to 21,103.36, 31,659.72 and 7,955.85 is: 11,935.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.36 : 31,659.72 = 7,955.85 : x
  2. Step 2: Convert to fraction form
    21,103.36/31,659.72 = 7,955.85/x
  3. Step 3: Cross multiply
    21,103.36x = 31,659.72 × 7,955.85
  4. Step 4: Simplify right side
    21,103.36x = 251,879,983.36
  5. Step 5: Solve for x
    x = 251,879,983.36/21,103.36
  6. Step 6: Final answer
    x = 11,935.54

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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.