Home / 20,209.72-30,313.38-9,111.92

Finding the Fourth Proportional to 20,209.72, 30,313.38 and 9,111.92

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Solution

The fourth proportional to 20,209.72, 30,313.38 and 9,111.92 is: 13,667.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.72 : 30,313.38 = 9,111.92 : x
  2. Step 2: Convert to fraction form
    20,209.72/30,313.38 = 9,111.92/x
  3. Step 3: Cross multiply
    20,209.72x = 30,313.38 × 9,111.92
  4. Step 4: Simplify right side
    20,209.72x = 276,213,093.49
  5. Step 5: Solve for x
    x = 276,213,093.49/20,209.72
  6. Step 6: Final answer
    x = 13,667.34

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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.