Home / 3,678.60-5,509.80-2,215.20

Finding the Fourth Proportional to 3,678.60, 5,509.80 and 2,215.20

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Solution

The fourth proportional to 3,678.60, 5,509.80 and 2,215.20 is: 3,317.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.60 : 5,509.80 = 2,215.20 : x
  2. Step 2: Convert to fraction form
    3,678.60/5,509.80 = 2,215.20/x
  3. Step 3: Cross multiply
    3,678.60x = 5,509.80 × 2,215.20
  4. Step 4: Simplify right side
    3,678.60x = 12,205,308.96
  5. Step 5: Solve for x
    x = 12,205,308.96/3,678.60
  6. Step 6: Final answer
    x = 3,317.92

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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.