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Finding the Fourth Proportional to 30,072.40, 45,022.20 and 18,408.40

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Solution

The fourth proportional to 30,072.40, 45,022.20 and 18,408.40 is: 27,559.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,072.40 : 45,022.20 = 18,408.40 : x
  2. Step 2: Convert to fraction form
    30,072.40/45,022.20 = 18,408.40/x
  3. Step 3: Cross multiply
    30,072.40x = 45,022.20 × 18,408.40
  4. Step 4: Simplify right side
    30,072.40x = 828,786,666.48
  5. Step 5: Solve for x
    x = 828,786,666.48/30,072.40
  6. Step 6: Final answer
    x = 27,559.71

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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.