Home / 28,279.16-38,998.99-18,189.80

Finding the Fourth Proportional to 28,279.16, 38,998.99 and 18,189.80

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Solution

The fourth proportional to 28,279.16, 38,998.99 and 18,189.80 is: 25,085.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.16 : 38,998.99 = 18,189.80 : x
  2. Step 2: Convert to fraction form
    28,279.16/38,998.99 = 18,189.80/x
  3. Step 3: Cross multiply
    28,279.16x = 38,998.99 × 18,189.80
  4. Step 4: Simplify right side
    28,279.16x = 709,383,542.36
  5. Step 5: Solve for x
    x = 709,383,542.36/28,279.16
  6. Step 6: Final answer
    x = 25,085.03

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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.