Home / 28,415.36-39,213.24-15,839.84

Finding the Fourth Proportional to 28,415.36, 39,213.24 and 15,839.84

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Solution

The fourth proportional to 28,415.36, 39,213.24 and 15,839.84 is: 21,859.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.36 : 39,213.24 = 15,839.84 : x
  2. Step 2: Convert to fraction form
    28,415.36/39,213.24 = 15,839.84/x
  3. Step 3: Cross multiply
    28,415.36x = 39,213.24 × 15,839.84
  4. Step 4: Simplify right side
    28,415.36x = 621,131,447.48
  5. Step 5: Solve for x
    x = 621,131,447.48/28,415.36
  6. Step 6: Final answer
    x = 21,859.00

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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.