Home / 3,455.90-4,768.88-2,129.63

Finding the Fourth Proportional to 3,455.90, 4,768.88 and 2,129.63

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Solution

The fourth proportional to 3,455.90, 4,768.88 and 2,129.63 is: 2,938.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.90 : 4,768.88 = 2,129.63 : x
  2. Step 2: Convert to fraction form
    3,455.90/4,768.88 = 2,129.63/x
  3. Step 3: Cross multiply
    3,455.90x = 4,768.88 × 2,129.63
  4. Step 4: Simplify right side
    3,455.90x = 10,155,915.42
  5. Step 5: Solve for x
    x = 10,155,915.42/3,455.90
  6. Step 6: Final answer
    x = 2,938.72

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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.