Home / 20,858.16-31,289.85-6,819.60

Finding the Fourth Proportional to 20,858.16, 31,289.85 and 6,819.60

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Solution

The fourth proportional to 20,858.16, 31,289.85 and 6,819.60 is: 10,230.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.16 : 31,289.85 = 6,819.60 : x
  2. Step 2: Convert to fraction form
    20,858.16/31,289.85 = 6,819.60/x
  3. Step 3: Cross multiply
    20,858.16x = 31,289.85 × 6,819.60
  4. Step 4: Simplify right side
    20,858.16x = 213,384,261.06
  5. Step 5: Solve for x
    x = 213,384,261.06/20,858.16
  6. Step 6: Final answer
    x = 10,230.25

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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.