Home / 3,855.60-5,317.36-3,109.32

Finding the Fourth Proportional to 3,855.60, 5,317.36 and 3,109.32

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Solution

The fourth proportional to 3,855.60, 5,317.36 and 3,109.32 is: 4,288.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.60 : 5,317.36 = 3,109.32 : x
  2. Step 2: Convert to fraction form
    3,855.60/5,317.36 = 3,109.32/x
  3. Step 3: Cross multiply
    3,855.60x = 5,317.36 × 3,109.32
  4. Step 4: Simplify right side
    3,855.60x = 16,533,373.80
  5. Step 5: Solve for x
    x = 16,533,373.80/3,855.60
  6. Step 6: Final answer
    x = 4,288.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.