Home / 5,478.36-8,219.57-3,930.72

Finding the Fourth Proportional to 5,478.36, 8,219.57 and 3,930.72

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Solution

The fourth proportional to 5,478.36, 8,219.57 and 3,930.72 is: 5,897.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.36 : 8,219.57 = 3,930.72 : x
  2. Step 2: Convert to fraction form
    5,478.36/8,219.57 = 3,930.72/x
  3. Step 3: Cross multiply
    5,478.36x = 8,219.57 × 3,930.72
  4. Step 4: Simplify right side
    5,478.36x = 32,308,828.19
  5. Step 5: Solve for x
    x = 32,308,828.19/5,478.36
  6. Step 6: Final answer
    x = 5,897.54

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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.