Home / 15,290.21-21,108.39-11,879.60

Finding the Fourth Proportional to 15,290.21, 21,108.39 and 11,879.60

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Solution

The fourth proportional to 15,290.21, 21,108.39 and 11,879.60 is: 16,399.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,290.21 : 21,108.39 = 11,879.60 : x
  2. Step 2: Convert to fraction form
    15,290.21/21,108.39 = 11,879.60/x
  3. Step 3: Cross multiply
    15,290.21x = 21,108.39 × 11,879.60
  4. Step 4: Simplify right side
    15,290.21x = 250,759,124.30
  5. Step 5: Solve for x
    x = 250,759,124.30/15,290.21
  6. Step 6: Final answer
    x = 16,399.98

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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.