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Finding the Fourth Proportional to 12,893.78, 19,340.69 and 3,533.88

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Solution

The fourth proportional to 12,893.78, 19,340.69 and 3,533.88 is: 5,300.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,893.78 : 19,340.69 = 3,533.88 : x
  2. Step 2: Convert to fraction form
    12,893.78/19,340.69 = 3,533.88/x
  3. Step 3: Cross multiply
    12,893.78x = 19,340.69 × 3,533.88
  4. Step 4: Simplify right side
    12,893.78x = 68,347,677.58
  5. Step 5: Solve for x
    x = 68,347,677.58/12,893.78
  6. Step 6: Final answer
    x = 5,300.83

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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.