Home / 20,147.40-30,221.10-7,664.52

Finding the Fourth Proportional to 20,147.40, 30,221.10 and 7,664.52

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Solution

The fourth proportional to 20,147.40, 30,221.10 and 7,664.52 is: 11,496.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.40 : 30,221.10 = 7,664.52 : x
  2. Step 2: Convert to fraction form
    20,147.40/30,221.10 = 7,664.52/x
  3. Step 3: Cross multiply
    20,147.40x = 30,221.10 × 7,664.52
  4. Step 4: Simplify right side
    20,147.40x = 231,630,225.37
  5. Step 5: Solve for x
    x = 231,630,225.37/20,147.40
  6. Step 6: Final answer
    x = 11,496.78

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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.