Home / 28,388.79-42,588.35-11,739.78

Finding the Fourth Proportional to 28,388.79, 42,588.35 and 11,739.78

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Solution

The fourth proportional to 28,388.79, 42,588.35 and 11,739.78 is: 17,611.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.79 : 42,588.35 = 11,739.78 : x
  2. Step 2: Convert to fraction form
    28,388.79/42,588.35 = 11,739.78/x
  3. Step 3: Cross multiply
    28,388.79x = 42,588.35 × 11,739.78
  4. Step 4: Simplify right side
    28,388.79x = 499,977,859.56
  5. Step 5: Solve for x
    x = 499,977,859.56/28,388.79
  6. Step 6: Final answer
    x = 17,611.81

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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.