Home / 20,998.28-28,975.33-12,045.55

Finding the Fourth Proportional to 20,998.28, 28,975.33 and 12,045.55

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Solution

The fourth proportional to 20,998.28, 28,975.33 and 12,045.55 is: 16,621.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.28 : 28,975.33 = 12,045.55 : x
  2. Step 2: Convert to fraction form
    20,998.28/28,975.33 = 12,045.55/x
  3. Step 3: Cross multiply
    20,998.28x = 28,975.33 × 12,045.55
  4. Step 4: Simplify right side
    20,998.28x = 349,023,786.28
  5. Step 5: Solve for x
    x = 349,023,786.28/20,998.28
  6. Step 6: Final answer
    x = 16,621.54

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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.