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Finding the Fourth Proportional to 13,191.34, 19,787.61 and 7,343.54

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Solution

The fourth proportional to 13,191.34, 19,787.61 and 7,343.54 is: 11,015.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.34 : 19,787.61 = 7,343.54 : x
  2. Step 2: Convert to fraction form
    13,191.34/19,787.61 = 7,343.54/x
  3. Step 3: Cross multiply
    13,191.34x = 19,787.61 × 7,343.54
  4. Step 4: Simplify right side
    13,191.34x = 145,311,105.54
  5. Step 5: Solve for x
    x = 145,311,105.54/13,191.34
  6. Step 6: Final answer
    x = 11,015.65

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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.