Home / 20,535.18-28,338.60-11,103.84

Finding the Fourth Proportional to 20,535.18, 28,338.60 and 11,103.84

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Solution

The fourth proportional to 20,535.18, 28,338.60 and 11,103.84 is: 15,323.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,535.18 : 28,338.60 = 11,103.84 : x
  2. Step 2: Convert to fraction form
    20,535.18/28,338.60 = 11,103.84/x
  3. Step 3: Cross multiply
    20,535.18x = 28,338.60 × 11,103.84
  4. Step 4: Simplify right side
    20,535.18x = 314,667,280.22
  5. Step 5: Solve for x
    x = 314,667,280.22/20,535.18
  6. Step 6: Final answer
    x = 15,323.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.