Home / 20,945.09-28,903.49-11,513.59

Finding the Fourth Proportional to 20,945.09, 28,903.49 and 11,513.59

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Solution

The fourth proportional to 20,945.09, 28,903.49 and 11,513.59 is: 15,888.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.09 : 28,903.49 = 11,513.59 : x
  2. Step 2: Convert to fraction form
    20,945.09/28,903.49 = 11,513.59/x
  3. Step 3: Cross multiply
    20,945.09x = 28,903.49 × 11,513.59
  4. Step 4: Simplify right side
    20,945.09x = 332,782,788.91
  5. Step 5: Solve for x
    x = 332,782,788.91/20,945.09
  6. Step 6: Final answer
    x = 15,888.34

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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.