Home / 3,411.90-5,120.01-1,851.21

Finding the Fourth Proportional to 3,411.90, 5,120.01 and 1,851.21

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Solution

The fourth proportional to 3,411.90, 5,120.01 and 1,851.21 is: 2,777.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,411.90 : 5,120.01 = 1,851.21 : x
  2. Step 2: Convert to fraction form
    3,411.90/5,120.01 = 1,851.21/x
  3. Step 3: Cross multiply
    3,411.90x = 5,120.01 × 1,851.21
  4. Step 4: Simplify right side
    3,411.90x = 9,478,213.71
  5. Step 5: Solve for x
    x = 9,478,213.71/3,411.90
  6. Step 6: Final answer
    x = 2,777.99

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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.