Home / 3,678.60-5,518.77-1,213.35

Finding the Fourth Proportional to 3,678.60, 5,518.77 and 1,213.35

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Solution

The fourth proportional to 3,678.60, 5,518.77 and 1,213.35 is: 1,820.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.60 : 5,518.77 = 1,213.35 : x
  2. Step 2: Convert to fraction form
    3,678.60/5,518.77 = 1,213.35/x
  3. Step 3: Cross multiply
    3,678.60x = 5,518.77 × 1,213.35
  4. Step 4: Simplify right side
    3,678.60x = 6,696,199.58
  5. Step 5: Solve for x
    x = 6,696,199.58/3,678.60
  6. Step 6: Final answer
    x = 1,820.31

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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.