Home / 21,274.46-31,911.69-21,243.71

Finding the Fourth Proportional to 21,274.46, 31,911.69 and 21,243.71

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Solution

The fourth proportional to 21,274.46, 31,911.69 and 21,243.71 is: 31,865.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.46 : 31,911.69 = 21,243.71 : x
  2. Step 2: Convert to fraction form
    21,274.46/31,911.69 = 21,243.71/x
  3. Step 3: Cross multiply
    21,274.46x = 31,911.69 × 21,243.71
  4. Step 4: Simplify right side
    21,274.46x = 677,922,727.92
  5. Step 5: Solve for x
    x = 677,922,727.92/21,274.46
  6. Step 6: Final answer
    x = 31,865.57

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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.