Home / 20,994.36-28,971.78-11,434.35

Finding the Fourth Proportional to 20,994.36, 28,971.78 and 11,434.35

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Solution

The fourth proportional to 20,994.36, 28,971.78 and 11,434.35 is: 15,779.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.36 : 28,971.78 = 11,434.35 : x
  2. Step 2: Convert to fraction form
    20,994.36/28,971.78 = 11,434.35/x
  3. Step 3: Cross multiply
    20,994.36x = 28,971.78 × 11,434.35
  4. Step 4: Simplify right side
    20,994.36x = 331,273,375.44
  5. Step 5: Solve for x
    x = 331,273,375.44/20,994.36
  6. Step 6: Final answer
    x = 15,779.16

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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.