Home / 20,703.88-28,571.42-11,272.50

Finding the Fourth Proportional to 20,703.88, 28,571.42 and 11,272.50

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Solution

The fourth proportional to 20,703.88, 28,571.42 and 11,272.50 is: 15,556.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.88 : 28,571.42 = 11,272.50 : x
  2. Step 2: Convert to fraction form
    20,703.88/28,571.42 = 11,272.50/x
  3. Step 3: Cross multiply
    20,703.88x = 28,571.42 × 11,272.50
  4. Step 4: Simplify right side
    20,703.88x = 322,071,331.95
  5. Step 5: Solve for x
    x = 322,071,331.95/20,703.88
  6. Step 6: Final answer
    x = 15,556.09

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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.