Home / 30,620.28-42,260.61-18,690.55

Finding the Fourth Proportional to 30,620.28, 42,260.61 and 18,690.55

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Solution

The fourth proportional to 30,620.28, 42,260.61 and 18,690.55 is: 25,795.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,620.28 : 42,260.61 = 18,690.55 : x
  2. Step 2: Convert to fraction form
    30,620.28/42,260.61 = 18,690.55/x
  3. Step 3: Cross multiply
    30,620.28x = 42,260.61 × 18,690.55
  4. Step 4: Simplify right side
    30,620.28x = 789,874,044.24
  5. Step 5: Solve for x
    x = 789,874,044.24/30,620.28
  6. Step 6: Final answer
    x = 25,795.78

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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.