Home / 20,630.70-28,405.62-18,205.56

Finding the Fourth Proportional to 20,630.70, 28,405.62 and 18,205.56

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Solution

The fourth proportional to 20,630.70, 28,405.62 and 18,205.56 is: 25,066.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.70 : 28,405.62 = 18,205.56 : x
  2. Step 2: Convert to fraction form
    20,630.70/28,405.62 = 18,205.56/x
  3. Step 3: Cross multiply
    20,630.70x = 28,405.62 × 18,205.56
  4. Step 4: Simplify right side
    20,630.70x = 517,140,219.25
  5. Step 5: Solve for x
    x = 517,140,219.25/20,630.70
  6. Step 6: Final answer
    x = 25,066.54

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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.