Home / 30,972-42,749.80-18,229.27

Finding the Fourth Proportional to 30,972, 42,749.80 and 18,229.27

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Solution

The fourth proportional to 30,972, 42,749.80 and 18,229.27 is: 25,161.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972 : 42,749.80 = 18,229.27 : x
  2. Step 2: Convert to fraction form
    30,972/42,749.80 = 18,229.27/x
  3. Step 3: Cross multiply
    30,972x = 42,749.80 × 18,229.27
  4. Step 4: Simplify right side
    30,972x = 779,297,646.65
  5. Step 5: Solve for x
    x = 779,297,646.65/30,972
  6. Step 6: Final answer
    x = 25,161.36

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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.