Home / 20,800.55-31,161.35-12,349.22

Finding the Fourth Proportional to 20,800.55, 31,161.35 and 12,349.22

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Solution

The fourth proportional to 20,800.55, 31,161.35 and 12,349.22 is: 18,500.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.55 : 31,161.35 = 12,349.22 : x
  2. Step 2: Convert to fraction form
    20,800.55/31,161.35 = 12,349.22/x
  3. Step 3: Cross multiply
    20,800.55x = 31,161.35 × 12,349.22
  4. Step 4: Simplify right side
    20,800.55x = 384,818,149.09
  5. Step 5: Solve for x
    x = 384,818,149.09/20,800.55
  6. Step 6: Final answer
    x = 18,500.39

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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.