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Finding the Fourth Proportional to 12,892.75, 19,340.97 and 4,890.46

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Solution

The fourth proportional to 12,892.75, 19,340.97 and 4,890.46 is: 7,336.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,892.75 : 19,340.97 = 4,890.46 : x
  2. Step 2: Convert to fraction form
    12,892.75/19,340.97 = 4,890.46/x
  3. Step 3: Cross multiply
    12,892.75x = 19,340.97 × 4,890.46
  4. Step 4: Simplify right side
    12,892.75x = 94,586,191.79
  5. Step 5: Solve for x
    x = 94,586,191.79/12,892.75
  6. Step 6: Final answer
    x = 7,336.39

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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.