Home / 20,203.79-30,320.26-11,455.79

Finding the Fourth Proportional to 20,203.79, 30,320.26 and 11,455.79

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Solution

The fourth proportional to 20,203.79, 30,320.26 and 11,455.79 is: 17,191.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,203.79 : 30,320.26 = 11,455.79 : x
  2. Step 2: Convert to fraction form
    20,203.79/30,320.26 = 11,455.79/x
  3. Step 3: Cross multiply
    20,203.79x = 30,320.26 × 11,455.79
  4. Step 4: Simplify right side
    20,203.79x = 347,342,351.06
  5. Step 5: Solve for x
    x = 347,342,351.06/20,203.79
  6. Step 6: Final answer
    x = 17,191.94

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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.