Home / 20,571.51-28,388.64-11,618.58

Finding the Fourth Proportional to 20,571.51, 28,388.64 and 11,618.58

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Solution

The fourth proportional to 20,571.51, 28,388.64 and 11,618.58 is: 16,033.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.51 : 28,388.64 = 11,618.58 : x
  2. Step 2: Convert to fraction form
    20,571.51/28,388.64 = 11,618.58/x
  3. Step 3: Cross multiply
    20,571.51x = 28,388.64 × 11,618.58
  4. Step 4: Simplify right side
    20,571.51x = 329,835,684.93
  5. Step 5: Solve for x
    x = 329,835,684.93/20,571.51
  6. Step 6: Final answer
    x = 16,033.62

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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.