Home / 20,704.36-31,036.50-8,220.28

Finding the Fourth Proportional to 20,704.36, 31,036.50 and 8,220.28

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Solution

The fourth proportional to 20,704.36, 31,036.50 and 8,220.28 is: 12,322.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.36 : 31,036.50 = 8,220.28 : x
  2. Step 2: Convert to fraction form
    20,704.36/31,036.50 = 8,220.28/x
  3. Step 3: Cross multiply
    20,704.36x = 31,036.50 × 8,220.28
  4. Step 4: Simplify right side
    20,704.36x = 255,128,720.22
  5. Step 5: Solve for x
    x = 255,128,720.22/20,704.36
  6. Step 6: Final answer
    x = 12,322.46

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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.