Home / 13,639.14-20,458.08-3,778.20

Finding the Fourth Proportional to 13,639.14, 20,458.08 and 3,778.20

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Solution

The fourth proportional to 13,639.14, 20,458.08 and 3,778.20 is: 5,667.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.14 : 20,458.08 = 3,778.20 : x
  2. Step 2: Convert to fraction form
    13,639.14/20,458.08 = 3,778.20/x
  3. Step 3: Cross multiply
    13,639.14x = 20,458.08 × 3,778.20
  4. Step 4: Simplify right side
    13,639.14x = 77,294,717.86
  5. Step 5: Solve for x
    x = 77,294,717.86/13,639.14
  6. Step 6: Final answer
    x = 5,667.13

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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.