Home / 30,120.34-45,131.23-18,238.11

Finding the Fourth Proportional to 30,120.34, 45,131.23 and 18,238.11

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Solution

The fourth proportional to 30,120.34, 45,131.23 and 18,238.11 is: 27,327.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,120.34 : 45,131.23 = 18,238.11 : x
  2. Step 2: Convert to fraction form
    30,120.34/45,131.23 = 18,238.11/x
  3. Step 3: Cross multiply
    30,120.34x = 45,131.23 × 18,238.11
  4. Step 4: Simplify right side
    30,120.34x = 823,108,337.18
  5. Step 5: Solve for x
    x = 823,108,337.18/30,120.34
  6. Step 6: Final answer
    x = 27,327.33

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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.