Home / 12,718.28-19,078.34-3,358.21

Finding the Fourth Proportional to 12,718.28, 19,078.34 and 3,358.21

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Solution

The fourth proportional to 12,718.28, 19,078.34 and 3,358.21 is: 5,037.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.28 : 19,078.34 = 3,358.21 : x
  2. Step 2: Convert to fraction form
    12,718.28/19,078.34 = 3,358.21/x
  3. Step 3: Cross multiply
    12,718.28x = 19,078.34 × 3,358.21
  4. Step 4: Simplify right side
    12,718.28x = 64,068,962.97
  5. Step 5: Solve for x
    x = 64,068,962.97/12,718.28
  6. Step 6: Final answer
    x = 5,037.55

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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.