Home / 21,191.20-31,787-5,396.26

Finding the Fourth Proportional to 21,191.20, 31,787 and 5,396.26

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Solution

The fourth proportional to 21,191.20, 31,787 and 5,396.26 is: 8,094.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.20 : 31,787 = 5,396.26 : x
  2. Step 2: Convert to fraction form
    21,191.20/31,787 = 5,396.26/x
  3. Step 3: Cross multiply
    21,191.20x = 31,787 × 5,396.26
  4. Step 4: Simplify right side
    21,191.20x = 171,530,916.62
  5. Step 5: Solve for x
    x = 171,530,916.62/21,191.20
  6. Step 6: Final answer
    x = 8,094.44

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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.