Home / 4,915.61-6,782.40-2,790.62

Finding the Fourth Proportional to 4,915.61, 6,782.40 and 2,790.62

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Solution

The fourth proportional to 4,915.61, 6,782.40 and 2,790.62 is: 3,850.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,915.61 : 6,782.40 = 2,790.62 : x
  2. Step 2: Convert to fraction form
    4,915.61/6,782.40 = 2,790.62/x
  3. Step 3: Cross multiply
    4,915.61x = 6,782.40 × 2,790.62
  4. Step 4: Simplify right side
    4,915.61x = 18,927,067.18
  5. Step 5: Solve for x
    x = 18,927,067.18/4,915.61
  6. Step 6: Final answer
    x = 3,850.40

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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.