Home / 4,915.80-6,782.40-3,145.95

Finding the Fourth Proportional to 4,915.80, 6,782.40 and 3,145.95

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Solution

The fourth proportional to 4,915.80, 6,782.40 and 3,145.95 is: 4,340.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,915.80 : 6,782.40 = 3,145.95 : x
  2. Step 2: Convert to fraction form
    4,915.80/6,782.40 = 3,145.95/x
  3. Step 3: Cross multiply
    4,915.80x = 6,782.40 × 3,145.95
  4. Step 4: Simplify right side
    4,915.80x = 21,337,091.28
  5. Step 5: Solve for x
    x = 21,337,091.28/4,915.80
  6. Step 6: Final answer
    x = 4,340.51

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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.