Home / 30,450.51-42,021.72-18,511.65

Finding the Fourth Proportional to 30,450.51, 42,021.72 and 18,511.65

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Solution

The fourth proportional to 30,450.51, 42,021.72 and 18,511.65 is: 25,546.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,450.51 : 42,021.72 = 18,511.65 : x
  2. Step 2: Convert to fraction form
    30,450.51/42,021.72 = 18,511.65/x
  3. Step 3: Cross multiply
    30,450.51x = 42,021.72 × 18,511.65
  4. Step 4: Simplify right side
    30,450.51x = 777,891,373.04
  5. Step 5: Solve for x
    x = 777,891,373.04/30,450.51
  6. Step 6: Final answer
    x = 25,546.09

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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.