Home / 13,219.92-19,829.16-5,428.44

Finding the Fourth Proportional to 13,219.92, 19,829.16 and 5,428.44

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Solution

The fourth proportional to 13,219.92, 19,829.16 and 5,428.44 is: 8,142.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.92 : 19,829.16 = 5,428.44 : x
  2. Step 2: Convert to fraction form
    13,219.92/19,829.16 = 5,428.44/x
  3. Step 3: Cross multiply
    13,219.92x = 19,829.16 × 5,428.44
  4. Step 4: Simplify right side
    13,219.92x = 107,641,405.31
  5. Step 5: Solve for x
    x = 107,641,405.31/13,219.92
  6. Step 6: Final answer
    x = 8,142.36

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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.