Home / 20,862.75-28,785.91-11,907.39

Finding the Fourth Proportional to 20,862.75, 28,785.91 and 11,907.39

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Solution

The fourth proportional to 20,862.75, 28,785.91 and 11,907.39 is: 16,429.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.75 : 28,785.91 = 11,907.39 : x
  2. Step 2: Convert to fraction form
    20,862.75/28,785.91 = 11,907.39/x
  3. Step 3: Cross multiply
    20,862.75x = 28,785.91 × 11,907.39
  4. Step 4: Simplify right side
    20,862.75x = 342,765,056.87
  5. Step 5: Solve for x
    x = 342,765,056.87/20,862.75
  6. Step 6: Final answer
    x = 16,429.52

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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.