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Finding the Fourth Proportional to 12,998.75, 17,938.28 and 7,334.70

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Solution

The fourth proportional to 12,998.75, 17,938.28 and 7,334.70 is: 10,121.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,998.75 : 17,938.28 = 7,334.70 : x
  2. Step 2: Convert to fraction form
    12,998.75/17,938.28 = 7,334.70/x
  3. Step 3: Cross multiply
    12,998.75x = 17,938.28 × 7,334.70
  4. Step 4: Simplify right side
    12,998.75x = 131,571,943.08
  5. Step 5: Solve for x
    x = 131,571,943.08/12,998.75
  6. Step 6: Final answer
    x = 10,121.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.