Home / 30,620.98-42,261.57-18,691.23

Finding the Fourth Proportional to 30,620.98, 42,261.57 and 18,691.23

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Solution

The fourth proportional to 30,620.98, 42,261.57 and 18,691.23 is: 25,796.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,620.98 : 42,261.57 = 18,691.23 : x
  2. Step 2: Convert to fraction form
    30,620.98/42,261.57 = 18,691.23/x
  3. Step 3: Cross multiply
    30,620.98x = 42,261.57 × 18,691.23
  4. Step 4: Simplify right side
    30,620.98x = 789,920,631.57
  5. Step 5: Solve for x
    x = 789,920,631.57/30,620.98
  6. Step 6: Final answer
    x = 25,796.72

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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.