Home / 13,905.82-19,191.38-7,938.36

Finding the Fourth Proportional to 13,905.82, 19,191.38 and 7,938.36

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Solution

The fourth proportional to 13,905.82, 19,191.38 and 7,938.36 is: 10,955.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.82 : 19,191.38 = 7,938.36 : x
  2. Step 2: Convert to fraction form
    13,905.82/19,191.38 = 7,938.36/x
  3. Step 3: Cross multiply
    13,905.82x = 19,191.38 × 7,938.36
  4. Step 4: Simplify right side
    13,905.82x = 152,348,083.34
  5. Step 5: Solve for x
    x = 152,348,083.34/13,905.82
  6. Step 6: Final answer
    x = 10,955.71

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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.