Home / 21,106.62-31,664.73-11,240.70

Finding the Fourth Proportional to 21,106.62, 31,664.73 and 11,240.70

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Solution

The fourth proportional to 21,106.62, 31,664.73 and 11,240.70 is: 16,863.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.62 : 31,664.73 = 11,240.70 : x
  2. Step 2: Convert to fraction form
    21,106.62/31,664.73 = 11,240.70/x
  3. Step 3: Cross multiply
    21,106.62x = 31,664.73 × 11,240.70
  4. Step 4: Simplify right side
    21,106.62x = 355,933,730.51
  5. Step 5: Solve for x
    x = 355,933,730.51/21,106.62
  6. Step 6: Final answer
    x = 16,863.61

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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.