Home / 20,138.72-30,208.02-6,991.04

Finding the Fourth Proportional to 20,138.72, 30,208.02 and 6,991.04

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Solution

The fourth proportional to 20,138.72, 30,208.02 and 6,991.04 is: 10,486.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.72 : 30,208.02 = 6,991.04 : x
  2. Step 2: Convert to fraction form
    20,138.72/30,208.02 = 6,991.04/x
  3. Step 3: Cross multiply
    20,138.72x = 30,208.02 × 6,991.04
  4. Step 4: Simplify right side
    20,138.72x = 211,185,476.14
  5. Step 5: Solve for x
    x = 211,185,476.14/20,138.72
  6. Step 6: Final answer
    x = 10,486.54

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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.