Home / 25,858.16-38,728.92-11,978

Finding the Fourth Proportional to 25,858.16, 38,728.92 and 11,978

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Solution

The fourth proportional to 25,858.16, 38,728.92 and 11,978 is: 17,939.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,858.16 : 38,728.92 = 11,978 : x
  2. Step 2: Convert to fraction form
    25,858.16/38,728.92 = 11,978/x
  3. Step 3: Cross multiply
    25,858.16x = 38,728.92 × 11,978
  4. Step 4: Simplify right side
    25,858.16x = 463,895,003.76
  5. Step 5: Solve for x
    x = 463,895,003.76/25,858.16
  6. Step 6: Final answer
    x = 17,939.99

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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.