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Finding the Fourth Proportional to 18,987.22, 26,202.04 and 11,029.51

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Solution

The fourth proportional to 18,987.22, 26,202.04 and 11,029.51 is: 15,220.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.22 : 26,202.04 = 11,029.51 : x
  2. Step 2: Convert to fraction form
    18,987.22/26,202.04 = 11,029.51/x
  3. Step 3: Cross multiply
    18,987.22x = 26,202.04 × 11,029.51
  4. Step 4: Simplify right side
    18,987.22x = 288,995,662.20
  5. Step 5: Solve for x
    x = 288,995,662.20/18,987.22
  6. Step 6: Final answer
    x = 15,220.54

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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.