Home / 12,686.28-19,033.20-3,921.84

Finding the Fourth Proportional to 12,686.28, 19,033.20 and 3,921.84

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Solution

The fourth proportional to 12,686.28, 19,033.20 and 3,921.84 is: 5,883.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.28 : 19,033.20 = 3,921.84 : x
  2. Step 2: Convert to fraction form
    12,686.28/19,033.20 = 3,921.84/x
  3. Step 3: Cross multiply
    12,686.28x = 19,033.20 × 3,921.84
  4. Step 4: Simplify right side
    12,686.28x = 74,645,165.09
  5. Step 5: Solve for x
    x = 74,645,165.09/12,686.28
  6. Step 6: Final answer
    x = 5,883.93

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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.