Home / 20,100.13-30,140.47-11,782.85

Finding the Fourth Proportional to 20,100.13, 30,140.47 and 11,782.85

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Solution

The fourth proportional to 20,100.13, 30,140.47 and 11,782.85 is: 17,668.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.13 : 30,140.47 = 11,782.85 : x
  2. Step 2: Convert to fraction form
    20,100.13/30,140.47 = 11,782.85/x
  3. Step 3: Cross multiply
    20,100.13x = 30,140.47 × 11,782.85
  4. Step 4: Simplify right side
    20,100.13x = 355,140,636.94
  5. Step 5: Solve for x
    x = 355,140,636.94/20,100.13
  6. Step 6: Final answer
    x = 17,668.57

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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.