Home / 5,148.68-7,719.60-1,861.34

Finding the Fourth Proportional to 5,148.68, 7,719.60 and 1,861.34

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Solution

The fourth proportional to 5,148.68, 7,719.60 and 1,861.34 is: 2,790.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.68 : 7,719.60 = 1,861.34 : x
  2. Step 2: Convert to fraction form
    5,148.68/7,719.60 = 1,861.34/x
  3. Step 3: Cross multiply
    5,148.68x = 7,719.60 × 1,861.34
  4. Step 4: Simplify right side
    5,148.68x = 14,368,811.15
  5. Step 5: Solve for x
    x = 14,368,811.15/5,148.68
  6. Step 6: Final answer
    x = 2,790.78

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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.