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Finding the Fourth Proportional to 13,191.21, 19,787.42 and 7,343.42

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Solution

The fourth proportional to 13,191.21, 19,787.42 and 7,343.42 is: 11,015.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.21 : 19,787.42 = 7,343.42 : x
  2. Step 2: Convert to fraction form
    13,191.21/19,787.42 = 7,343.42/x
  3. Step 3: Cross multiply
    13,191.21x = 19,787.42 × 7,343.42
  4. Step 4: Simplify right side
    13,191.21x = 145,307,255.20
  5. Step 5: Solve for x
    x = 145,307,255.20/13,191.21
  6. Step 6: Final answer
    x = 11,015.46

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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.