Home / 30,884.25-42,621.09-18,780.55

Finding the Fourth Proportional to 30,884.25, 42,621.09 and 18,780.55

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Solution

The fourth proportional to 30,884.25, 42,621.09 and 18,780.55 is: 25,917.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,884.25 : 42,621.09 = 18,780.55 : x
  2. Step 2: Convert to fraction form
    30,884.25/42,621.09 = 18,780.55/x
  3. Step 3: Cross multiply
    30,884.25x = 42,621.09 × 18,780.55
  4. Step 4: Simplify right side
    30,884.25x = 800,447,511.80
  5. Step 5: Solve for x
    x = 800,447,511.80/30,884.25
  6. Step 6: Final answer
    x = 25,917.66

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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.