Home / 4,810.80-6,639.80-2,821.35

Finding the Fourth Proportional to 4,810.80, 6,639.80 and 2,821.35

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Solution

The fourth proportional to 4,810.80, 6,639.80 and 2,821.35 is: 3,893.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,810.80 : 6,639.80 = 2,821.35 : x
  2. Step 2: Convert to fraction form
    4,810.80/6,639.80 = 2,821.35/x
  3. Step 3: Cross multiply
    4,810.80x = 6,639.80 × 2,821.35
  4. Step 4: Simplify right side
    4,810.80x = 18,733,199.73
  5. Step 5: Solve for x
    x = 18,733,199.73/4,810.80
  6. Step 6: Final answer
    x = 3,893.99

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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.