Home / 20,571.66-28,388.84-11,140.22

Finding the Fourth Proportional to 20,571.66, 28,388.84 and 11,140.22

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Solution

The fourth proportional to 20,571.66, 28,388.84 and 11,140.22 is: 15,373.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.66 : 28,388.84 = 11,140.22 : x
  2. Step 2: Convert to fraction form
    20,571.66/28,388.84 = 11,140.22/x
  3. Step 3: Cross multiply
    20,571.66x = 28,388.84 × 11,140.22
  4. Step 4: Simplify right side
    20,571.66x = 316,257,867.44
  5. Step 5: Solve for x
    x = 316,257,867.44/20,571.66
  6. Step 6: Final answer
    x = 15,373.47

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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.