Home / 12,276.78-18,415.14-3,511.68

Finding the Fourth Proportional to 12,276.78, 18,415.14 and 3,511.68

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Solution

The fourth proportional to 12,276.78, 18,415.14 and 3,511.68 is: 5,267.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,276.78 : 18,415.14 = 3,511.68 : x
  2. Step 2: Convert to fraction form
    12,276.78/18,415.14 = 3,511.68/x
  3. Step 3: Cross multiply
    12,276.78x = 18,415.14 × 3,511.68
  4. Step 4: Simplify right side
    12,276.78x = 64,668,078.84
  5. Step 5: Solve for x
    x = 64,668,078.84/12,276.78
  6. Step 6: Final answer
    x = 5,267.51

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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.