Home / 20,583.09-28,404.70-11,151.66

Finding the Fourth Proportional to 20,583.09, 28,404.70 and 11,151.66

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Solution

The fourth proportional to 20,583.09, 28,404.70 and 11,151.66 is: 15,389.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,583.09 : 28,404.70 = 11,151.66 : x
  2. Step 2: Convert to fraction form
    20,583.09/28,404.70 = 11,151.66/x
  3. Step 3: Cross multiply
    20,583.09x = 28,404.70 × 11,151.66
  4. Step 4: Simplify right side
    20,583.09x = 316,759,556.80
  5. Step 5: Solve for x
    x = 316,759,556.80/20,583.09
  6. Step 6: Final answer
    x = 15,389.31

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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.