Home / 20,113.20-30,173.40-8,427.60

Finding the Fourth Proportional to 20,113.20, 30,173.40 and 8,427.60

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Solution

The fourth proportional to 20,113.20, 30,173.40 and 8,427.60 is: 12,642.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,113.20 : 30,173.40 = 8,427.60 : x
  2. Step 2: Convert to fraction form
    20,113.20/30,173.40 = 8,427.60/x
  3. Step 3: Cross multiply
    20,113.20x = 30,173.40 × 8,427.60
  4. Step 4: Simplify right side
    20,113.20x = 254,289,345.84
  5. Step 5: Solve for x
    x = 254,289,345.84/20,113.20
  6. Step 6: Final answer
    x = 12,642.91

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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.