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Finding the Fourth Proportional to 4,915.89, 6,784.56 and 2,820.02

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Solution

The fourth proportional to 4,915.89, 6,784.56 and 2,820.02 is: 3,891.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,915.89 : 6,784.56 = 2,820.02 : x
  2. Step 2: Convert to fraction form
    4,915.89/6,784.56 = 2,820.02/x
  3. Step 3: Cross multiply
    4,915.89x = 6,784.56 × 2,820.02
  4. Step 4: Simplify right side
    4,915.89x = 19,132,560.97
  5. Step 5: Solve for x
    x = 19,132,560.97/4,915.89
  6. Step 6: Final answer
    x = 3,891.98

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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.