Home / 3,900.90-5,851.35-1,435.80

Finding the Fourth Proportional to 3,900.90, 5,851.35 and 1,435.80

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Solution

The fourth proportional to 3,900.90, 5,851.35 and 1,435.80 is: 2,153.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.90 : 5,851.35 = 1,435.80 : x
  2. Step 2: Convert to fraction form
    3,900.90/5,851.35 = 1,435.80/x
  3. Step 3: Cross multiply
    3,900.90x = 5,851.35 × 1,435.80
  4. Step 4: Simplify right side
    3,900.90x = 8,401,368.33
  5. Step 5: Solve for x
    x = 8,401,368.33/3,900.90
  6. Step 6: Final answer
    x = 2,153.70

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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.