Home / 3,915.42-5,408.04-2,851.50

Finding the Fourth Proportional to 3,915.42, 5,408.04 and 2,851.50

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Solution

The fourth proportional to 3,915.42, 5,408.04 and 2,851.50 is: 3,938.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.42 : 5,408.04 = 2,851.50 : x
  2. Step 2: Convert to fraction form
    3,915.42/5,408.04 = 2,851.50/x
  3. Step 3: Cross multiply
    3,915.42x = 5,408.04 × 2,851.50
  4. Step 4: Simplify right side
    3,915.42x = 15,421,026.06
  5. Step 5: Solve for x
    x = 15,421,026.06/3,915.42
  6. Step 6: Final answer
    x = 3,938.54

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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.