Home / 13,639.30-20,458.96-3,778.36

Finding the Fourth Proportional to 13,639.30, 20,458.96 and 3,778.36

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Solution

The fourth proportional to 13,639.30, 20,458.96 and 3,778.36 is: 5,667.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.30 : 20,458.96 = 3,778.36 : x
  2. Step 2: Convert to fraction form
    13,639.30/20,458.96 = 3,778.36/x
  3. Step 3: Cross multiply
    13,639.30x = 20,458.96 × 3,778.36
  4. Step 4: Simplify right side
    13,639.30x = 77,301,316.11
  5. Step 5: Solve for x
    x = 77,301,316.11/13,639.30
  6. Step 6: Final answer
    x = 5,667.54

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Similar ratio
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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.