Home / 20,570.25-30,855.48-4,987.88

Finding the Fourth Proportional to 20,570.25, 30,855.48 and 4,987.88

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Solution

The fourth proportional to 20,570.25, 30,855.48 and 4,987.88 is: 7,481.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.25 : 30,855.48 = 4,987.88 : x
  2. Step 2: Convert to fraction form
    20,570.25/30,855.48 = 4,987.88/x
  3. Step 3: Cross multiply
    20,570.25x = 30,855.48 × 4,987.88
  4. Step 4: Simplify right side
    20,570.25x = 153,903,258.60
  5. Step 5: Solve for x
    x = 153,903,258.60/20,570.25
  6. Step 6: Final answer
    x = 7,481.84

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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.