Home / 18,881.37-28,296.51-7,188.21

Finding the Fourth Proportional to 18,881.37, 28,296.51 and 7,188.21

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Solution

The fourth proportional to 18,881.37, 28,296.51 and 7,188.21 is: 10,772.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.37 : 28,296.51 = 7,188.21 : x
  2. Step 2: Convert to fraction form
    18,881.37/28,296.51 = 7,188.21/x
  3. Step 3: Cross multiply
    18,881.37x = 28,296.51 × 7,188.21
  4. Step 4: Simplify right side
    18,881.37x = 203,401,170.47
  5. Step 5: Solve for x
    x = 203,401,170.47/18,881.37
  6. Step 6: Final answer
    x = 10,772.59

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1.5x scale

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.