Home / 3,989.20-5,504.95-2,220.77

Finding the Fourth Proportional to 3,989.20, 5,504.95 and 2,220.77

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Solution

The fourth proportional to 3,989.20, 5,504.95 and 2,220.77 is: 3,064.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.20 : 5,504.95 = 2,220.77 : x
  2. Step 2: Convert to fraction form
    3,989.20/5,504.95 = 2,220.77/x
  3. Step 3: Cross multiply
    3,989.20x = 5,504.95 × 2,220.77
  4. Step 4: Simplify right side
    3,989.20x = 12,225,208.50
  5. Step 5: Solve for x
    x = 12,225,208.50/3,989.20
  6. Step 6: Final answer
    x = 3,064.58

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Half scale
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Double scale
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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.