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Finding the Fourth Proportional to 12,693, 19,039.56 and 4,485

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Solution

The fourth proportional to 12,693, 19,039.56 and 4,485 is: 6,727.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,693 : 19,039.56 = 4,485 : x
  2. Step 2: Convert to fraction form
    12,693/19,039.56 = 4,485/x
  3. Step 3: Cross multiply
    12,693x = 19,039.56 × 4,485
  4. Step 4: Simplify right side
    12,693x = 85,392,426.60
  5. Step 5: Solve for x
    x = 85,392,426.60/12,693
  6. Step 6: Final answer
    x = 6,727.52

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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.