Home / 21,246.71-31,859.73-12,821.90

Finding the Fourth Proportional to 21,246.71, 31,859.73 and 12,821.90

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Solution

The fourth proportional to 21,246.71, 31,859.73 and 12,821.90 is: 19,226.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.71 : 31,859.73 = 12,821.90 : x
  2. Step 2: Convert to fraction form
    21,246.71/31,859.73 = 12,821.90/x
  3. Step 3: Cross multiply
    21,246.71x = 31,859.73 × 12,821.90
  4. Step 4: Simplify right side
    21,246.71x = 408,502,112.79
  5. Step 5: Solve for x
    x = 408,502,112.79/21,246.71
  6. Step 6: Final answer
    x = 19,226.61

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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.