Home / 21,106.75-31,660.16-7,255.75

Finding the Fourth Proportional to 21,106.75, 31,660.16 and 7,255.75

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Solution

The fourth proportional to 21,106.75, 31,660.16 and 7,255.75 is: 10,883.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.75 : 31,660.16 = 7,255.75 : x
  2. Step 2: Convert to fraction form
    21,106.75/31,660.16 = 7,255.75/x
  3. Step 3: Cross multiply
    21,106.75x = 31,660.16 × 7,255.75
  4. Step 4: Simplify right side
    21,106.75x = 229,718,169.64
  5. Step 5: Solve for x
    x = 229,718,169.64/21,106.75
  6. Step 6: Final answer
    x = 10,883.64

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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.