Home / 20,219.70-30,329.55-18,405.30

Finding the Fourth Proportional to 20,219.70, 30,329.55 and 18,405.30

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Solution

The fourth proportional to 20,219.70, 30,329.55 and 18,405.30 is: 27,607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.70 : 30,329.55 = 18,405.30 : x
  2. Step 2: Convert to fraction form
    20,219.70/30,329.55 = 18,405.30/x
  3. Step 3: Cross multiply
    20,219.70x = 30,329.55 × 18,405.30
  4. Step 4: Simplify right side
    20,219.70x = 558,224,466.62
  5. Step 5: Solve for x
    x = 558,224,466.62/20,219.70
  6. Step 6: Final answer
    x = 27,607.95

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1.5x scale

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.