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Finding the Fourth Proportional to 19,993.10, 30,008.07 and 18,787.55

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Solution

The fourth proportional to 19,993.10, 30,008.07 and 18,787.55 is: 28,198.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,993.10 : 30,008.07 = 18,787.55 : x
  2. Step 2: Convert to fraction form
    19,993.10/30,008.07 = 18,787.55/x
  3. Step 3: Cross multiply
    19,993.10x = 30,008.07 × 18,787.55
  4. Step 4: Simplify right side
    19,993.10x = 563,777,965.49
  5. Step 5: Solve for x
    x = 563,777,965.49/19,993.10
  6. Step 6: Final answer
    x = 28,198.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.