Home / 13,406.72-20,100.96-6,820.20

Finding the Fourth Proportional to 13,406.72, 20,100.96 and 6,820.20

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Solution

The fourth proportional to 13,406.72, 20,100.96 and 6,820.20 is: 10,225.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.72 : 20,100.96 = 6,820.20 : x
  2. Step 2: Convert to fraction form
    13,406.72/20,100.96 = 6,820.20/x
  3. Step 3: Cross multiply
    13,406.72x = 20,100.96 × 6,820.20
  4. Step 4: Simplify right side
    13,406.72x = 137,092,567.39
  5. Step 5: Solve for x
    x = 137,092,567.39/13,406.72
  6. Step 6: Final answer
    x = 10,225.66

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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.