Home / 5,447.40-8,175.20-3,990.32

Finding the Fourth Proportional to 5,447.40, 8,175.20 and 3,990.32

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Solution

The fourth proportional to 5,447.40, 8,175.20 and 3,990.32 is: 5,988.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,447.40 : 8,175.20 = 3,990.32 : x
  2. Step 2: Convert to fraction form
    5,447.40/8,175.20 = 3,990.32/x
  3. Step 3: Cross multiply
    5,447.40x = 8,175.20 × 3,990.32
  4. Step 4: Simplify right side
    5,447.40x = 32,621,664.06
  5. Step 5: Solve for x
    x = 32,621,664.06/5,447.40
  6. Step 6: Final answer
    x = 5,988.48

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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.