Home / 30,621.22-42,258.87-17,191.78

Finding the Fourth Proportional to 30,621.22, 42,258.87 and 17,191.78

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Solution

The fourth proportional to 30,621.22, 42,258.87 and 17,191.78 is: 23,725.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621.22 : 42,258.87 = 17,191.78 : x
  2. Step 2: Convert to fraction form
    30,621.22/42,258.87 = 17,191.78/x
  3. Step 3: Cross multiply
    30,621.22x = 42,258.87 × 17,191.78
  4. Step 4: Simplify right side
    30,621.22x = 726,505,196.09
  5. Step 5: Solve for x
    x = 726,505,196.09/30,621.22
  6. Step 6: Final answer
    x = 23,725.55

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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.