Home / 21,521.25-29,698.52-11,961.72

Finding the Fourth Proportional to 21,521.25, 29,698.52 and 11,961.72

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Solution

The fourth proportional to 21,521.25, 29,698.52 and 11,961.72 is: 16,506.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.25 : 29,698.52 = 11,961.72 : x
  2. Step 2: Convert to fraction form
    21,521.25/29,698.52 = 11,961.72/x
  3. Step 3: Cross multiply
    21,521.25x = 29,698.52 × 11,961.72
  4. Step 4: Simplify right side
    21,521.25x = 355,245,320.85
  5. Step 5: Solve for x
    x = 355,245,320.85/21,521.25
  6. Step 6: Final answer
    x = 16,506.72

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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.