Home / 30,620.57-42,261-18,690.84

Finding the Fourth Proportional to 30,620.57, 42,261 and 18,690.84

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Solution

The fourth proportional to 30,620.57, 42,261 and 18,690.84 is: 25,796.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,620.57 : 42,261 = 18,690.84 : x
  2. Step 2: Convert to fraction form
    30,620.57/42,261 = 18,690.84/x
  3. Step 3: Cross multiply
    30,620.57x = 42,261 × 18,690.84
  4. Step 4: Simplify right side
    30,620.57x = 789,893,589.24
  5. Step 5: Solve for x
    x = 789,893,589.24/30,620.57
  6. Step 6: Final answer
    x = 25,796.18

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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.