Home / 20,858.19-31,305.51-12,081.03

Finding the Fourth Proportional to 20,858.19, 31,305.51 and 12,081.03

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Solution

The fourth proportional to 20,858.19, 31,305.51 and 12,081.03 is: 18,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.19 : 31,305.51 = 12,081.03 : x
  2. Step 2: Convert to fraction form
    20,858.19/31,305.51 = 12,081.03/x
  3. Step 3: Cross multiply
    20,858.19x = 31,305.51 × 12,081.03
  4. Step 4: Simplify right side
    20,858.19x = 378,202,805.48
  5. Step 5: Solve for x
    x = 378,202,805.48/20,858.19
  6. Step 6: Final answer
    x = 18,132.10

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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.