Home / 3,101.50-4,277.46-1,921.78

Finding the Fourth Proportional to 3,101.50, 4,277.46 and 1,921.78

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Solution

The fourth proportional to 3,101.50, 4,277.46 and 1,921.78 is: 2,650.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,101.50 : 4,277.46 = 1,921.78 : x
  2. Step 2: Convert to fraction form
    3,101.50/4,277.46 = 1,921.78/x
  3. Step 3: Cross multiply
    3,101.50x = 4,277.46 × 1,921.78
  4. Step 4: Simplify right side
    3,101.50x = 8,220,337.08
  5. Step 5: Solve for x
    x = 8,220,337.08/3,101.50
  6. Step 6: Final answer
    x = 2,650.44

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,102.50, 4,278.84 and 1,922.78
Similar ratio
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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.