Home / 21,228.75-31,843.13-6,636.75

Finding the Fourth Proportional to 21,228.75, 31,843.13 and 6,636.75

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Solution

The fourth proportional to 21,228.75, 31,843.13 and 6,636.75 is: 9,955.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.75 : 31,843.13 = 6,636.75 : x
  2. Step 2: Convert to fraction form
    21,228.75/31,843.13 = 6,636.75/x
  3. Step 3: Cross multiply
    21,228.75x = 31,843.13 × 6,636.75
  4. Step 4: Simplify right side
    21,228.75x = 211,334,859.84
  5. Step 5: Solve for x
    x = 211,334,859.84/21,228.75
  6. Step 6: Final answer
    x = 9,955.13

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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.