Home / 20,485.24-30,739.79-8,638.27

Finding the Fourth Proportional to 20,485.24, 30,739.79 and 8,638.27

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Solution

The fourth proportional to 20,485.24, 30,739.79 and 8,638.27 is: 12,962.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.24 : 30,739.79 = 8,638.27 : x
  2. Step 2: Convert to fraction form
    20,485.24/30,739.79 = 8,638.27/x
  3. Step 3: Cross multiply
    20,485.24x = 30,739.79 × 8,638.27
  4. Step 4: Simplify right side
    20,485.24x = 265,538,605.76
  5. Step 5: Solve for x
    x = 265,538,605.76/20,485.24
  6. Step 6: Final answer
    x = 12,962.44

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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.