Home / 20,649.31-28,493.62-12,149.56

Finding the Fourth Proportional to 20,649.31, 28,493.62 and 12,149.56

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Solution

The fourth proportional to 20,649.31, 28,493.62 and 12,149.56 is: 16,764.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.31 : 28,493.62 = 12,149.56 : x
  2. Step 2: Convert to fraction form
    20,649.31/28,493.62 = 12,149.56/x
  3. Step 3: Cross multiply
    20,649.31x = 28,493.62 × 12,149.56
  4. Step 4: Simplify right side
    20,649.31x = 346,184,945.81
  5. Step 5: Solve for x
    x = 346,184,945.81/20,649.31
  6. Step 6: Final answer
    x = 16,764.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.