Home / 21,112.92-31,673.89-7,785.95

Finding the Fourth Proportional to 21,112.92, 31,673.89 and 7,785.95

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Solution

The fourth proportional to 21,112.92, 31,673.89 and 7,785.95 is: 11,680.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.92 : 31,673.89 = 7,785.95 : x
  2. Step 2: Convert to fraction form
    21,112.92/31,673.89 = 7,785.95/x
  3. Step 3: Cross multiply
    21,112.92x = 31,673.89 × 7,785.95
  4. Step 4: Simplify right side
    21,112.92x = 246,611,244.66
  5. Step 5: Solve for x
    x = 246,611,244.66/21,112.92
  6. Step 6: Final answer
    x = 11,680.59

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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.