Home / 20,728.66-31,099.05-6,688.39

Finding the Fourth Proportional to 20,728.66, 31,099.05 and 6,688.39

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Solution

The fourth proportional to 20,728.66, 31,099.05 and 6,688.39 is: 10,034.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.66 : 31,099.05 = 6,688.39 : x
  2. Step 2: Convert to fraction form
    20,728.66/31,099.05 = 6,688.39/x
  3. Step 3: Cross multiply
    20,728.66x = 31,099.05 × 6,688.39
  4. Step 4: Simplify right side
    20,728.66x = 208,002,575.03
  5. Step 5: Solve for x
    x = 208,002,575.03/20,728.66
  6. Step 6: Final answer
    x = 10,034.54

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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.