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Finding the Fourth Proportional to 5,179.95, 7,149.94 and 4,915.42

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Solution

The fourth proportional to 5,179.95, 7,149.94 and 4,915.42 is: 6,784.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.95 : 7,149.94 = 4,915.42 : x
  2. Step 2: Convert to fraction form
    5,179.95/7,149.94 = 4,915.42/x
  3. Step 3: Cross multiply
    5,179.95x = 7,149.94 × 4,915.42
  4. Step 4: Simplify right side
    5,179.95x = 35,144,927.91
  5. Step 5: Solve for x
    x = 35,144,927.91/5,179.95
  6. Step 6: Final answer
    x = 6,784.80

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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.