Home / 3,807.15-5,255.28-2,820.39

Finding the Fourth Proportional to 3,807.15, 5,255.28 and 2,820.39

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Solution

The fourth proportional to 3,807.15, 5,255.28 and 2,820.39 is: 3,893.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,807.15 : 5,255.28 = 2,820.39 : x
  2. Step 2: Convert to fraction form
    3,807.15/5,255.28 = 2,820.39/x
  3. Step 3: Cross multiply
    3,807.15x = 5,255.28 × 2,820.39
  4. Step 4: Simplify right side
    3,807.15x = 14,821,939.16
  5. Step 5: Solve for x
    x = 14,821,939.16/3,807.15
  6. Step 6: Final answer
    x = 3,893.18

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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.