Home / 30,896.06-42,622.97-20,820.83

Finding the Fourth Proportional to 30,896.06, 42,622.97 and 20,820.83

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Solution

The fourth proportional to 30,896.06, 42,622.97 and 20,820.83 is: 28,723.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,896.06 : 42,622.97 = 20,820.83 : x
  2. Step 2: Convert to fraction form
    30,896.06/42,622.97 = 20,820.83/x
  3. Step 3: Cross multiply
    30,896.06x = 42,622.97 × 20,820.83
  4. Step 4: Simplify right side
    30,896.06x = 887,445,295.25
  5. Step 5: Solve for x
    x = 887,445,295.25/30,896.06
  6. Step 6: Final answer
    x = 28,723.58

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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.