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Finding the Fourth Proportional to 13,903.16, 19,186.17 and 7,938.32

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Solution

The fourth proportional to 13,903.16, 19,186.17 and 7,938.32 is: 10,954.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.16 : 19,186.17 = 7,938.32 : x
  2. Step 2: Convert to fraction form
    13,903.16/19,186.17 = 7,938.32/x
  3. Step 3: Cross multiply
    13,903.16x = 19,186.17 × 7,938.32
  4. Step 4: Simplify right side
    13,903.16x = 152,305,957.03
  5. Step 5: Solve for x
    x = 152,305,957.03/13,903.16
  6. Step 6: Final answer
    x = 10,954.77

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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.