Home / 30,621.78-42,262.68-18,692.06

Finding the Fourth Proportional to 30,621.78, 42,262.68 and 18,692.06

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Solution

The fourth proportional to 30,621.78, 42,262.68 and 18,692.06 is: 25,797.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621.78 : 42,262.68 = 18,692.06 : x
  2. Step 2: Convert to fraction form
    30,621.78/42,262.68 = 18,692.06/x
  3. Step 3: Cross multiply
    30,621.78x = 42,262.68 × 18,692.06
  4. Step 4: Simplify right side
    30,621.78x = 789,976,339.01
  5. Step 5: Solve for x
    x = 789,976,339.01/30,621.78
  6. Step 6: Final answer
    x = 25,797.86

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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.