Home / 4,985.80-6,881.00-2,861.58

Finding the Fourth Proportional to 4,985.80, 6,881.00 and 2,861.58

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Solution

The fourth proportional to 4,985.80, 6,881.00 and 2,861.58 is: 3,949.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.80 : 6,881.00 = 2,861.58 : x
  2. Step 2: Convert to fraction form
    4,985.80/6,881.00 = 2,861.58/x
  3. Step 3: Cross multiply
    4,985.80x = 6,881.00 × 2,861.58
  4. Step 4: Simplify right side
    4,985.80x = 19,690,520.87
  5. Step 5: Solve for x
    x = 19,690,520.87/4,985.80
  6. Step 6: Final answer
    x = 3,949.32

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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.