Home / 12,787.14-17,645.13-7,121.46

Finding the Fourth Proportional to 12,787.14, 17,645.13 and 7,121.46

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Solution

The fourth proportional to 12,787.14, 17,645.13 and 7,121.46 is: 9,826.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.14 : 17,645.13 = 7,121.46 : x
  2. Step 2: Convert to fraction form
    12,787.14/17,645.13 = 7,121.46/x
  3. Step 3: Cross multiply
    12,787.14x = 17,645.13 × 7,121.46
  4. Step 4: Simplify right side
    12,787.14x = 125,659,087.49
  5. Step 5: Solve for x
    x = 125,659,087.49/12,787.14
  6. Step 6: Final answer
    x = 9,826.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.