Home / 21,108.54-31,658.49-7,953.66

Finding the Fourth Proportional to 21,108.54, 31,658.49 and 7,953.66

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Solution

The fourth proportional to 21,108.54, 31,658.49 and 7,953.66 is: 11,928.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.54 : 31,658.49 = 7,953.66 : x
  2. Step 2: Convert to fraction form
    21,108.54/31,658.49 = 7,953.66/x
  3. Step 3: Cross multiply
    21,108.54x = 31,658.49 × 7,953.66
  4. Step 4: Simplify right side
    21,108.54x = 251,800,865.57
  5. Step 5: Solve for x
    x = 251,800,865.57/21,108.54
  6. Step 6: Final answer
    x = 11,928.86

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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.