Home / 20,099.36-30,139.68-11,781.92

Finding the Fourth Proportional to 20,099.36, 30,139.68 and 11,781.92

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Solution

The fourth proportional to 20,099.36, 30,139.68 and 11,781.92 is: 17,667.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,099.36 : 30,139.68 = 11,781.92 : x
  2. Step 2: Convert to fraction form
    20,099.36/30,139.68 = 11,781.92/x
  3. Step 3: Cross multiply
    20,099.36x = 30,139.68 × 11,781.92
  4. Step 4: Simplify right side
    20,099.36x = 355,103,298.59
  5. Step 5: Solve for x
    x = 355,103,298.59/20,099.36
  6. Step 6: Final answer
    x = 17,667.39

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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.