Home / 30,383.22-41,881.10-20,806.55

Finding the Fourth Proportional to 30,383.22, 41,881.10 and 20,806.55

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Solution

The fourth proportional to 30,383.22, 41,881.10 and 20,806.55 is: 28,680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,383.22 : 41,881.10 = 20,806.55 : x
  2. Step 2: Convert to fraction form
    30,383.22/41,881.10 = 20,806.55/x
  3. Step 3: Cross multiply
    30,383.22x = 41,881.10 × 20,806.55
  4. Step 4: Simplify right side
    30,383.22x = 871,400,887.77
  5. Step 5: Solve for x
    x = 871,400,887.77/30,383.22
  6. Step 6: Final answer
    x = 28,680.33

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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.