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Finding the Fourth Proportional to 12,648.75, 18,943.61 and 9,998.46

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Solution

The fourth proportional to 12,648.75, 18,943.61 and 9,998.46 is: 14,974.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,648.75 : 18,943.61 = 9,998.46 : x
  2. Step 2: Convert to fraction form
    12,648.75/18,943.61 = 9,998.46/x
  3. Step 3: Cross multiply
    12,648.75x = 18,943.61 × 9,998.46
  4. Step 4: Simplify right side
    12,648.75x = 189,406,940.67
  5. Step 5: Solve for x
    x = 189,406,940.67/12,648.75
  6. Step 6: Final answer
    x = 14,974.36

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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.