Home / 20,380.06-28,100.47-18,868.60

Finding the Fourth Proportional to 20,380.06, 28,100.47 and 18,868.60

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Solution

The fourth proportional to 20,380.06, 28,100.47 and 18,868.60 is: 26,016.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.06 : 28,100.47 = 18,868.60 : x
  2. Step 2: Convert to fraction form
    20,380.06/28,100.47 = 18,868.60/x
  3. Step 3: Cross multiply
    20,380.06x = 28,100.47 × 18,868.60
  4. Step 4: Simplify right side
    20,380.06x = 530,216,293.40
  5. Step 5: Solve for x
    x = 530,216,293.40/20,380.06
  6. Step 6: Final answer
    x = 26,016.43

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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.