Home / 20,477.22-30,720.15-6,438.68

Finding the Fourth Proportional to 20,477.22, 30,720.15 and 6,438.68

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Solution

The fourth proportional to 20,477.22, 30,720.15 and 6,438.68 is: 9,659.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.22 : 30,720.15 = 6,438.68 : x
  2. Step 2: Convert to fraction form
    20,477.22/30,720.15 = 6,438.68/x
  3. Step 3: Cross multiply
    20,477.22x = 30,720.15 × 6,438.68
  4. Step 4: Simplify right side
    20,477.22x = 197,797,061.80
  5. Step 5: Solve for x
    x = 197,797,061.80/20,477.22
  6. Step 6: Final answer
    x = 9,659.37

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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.