Home / 3,881.21-5,356.04-2,112.77

Finding the Fourth Proportional to 3,881.21, 5,356.04 and 2,112.77

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Solution

The fourth proportional to 3,881.21, 5,356.04 and 2,112.77 is: 2,915.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.21 : 5,356.04 = 2,112.77 : x
  2. Step 2: Convert to fraction form
    3,881.21/5,356.04 = 2,112.77/x
  3. Step 3: Cross multiply
    3,881.21x = 5,356.04 × 2,112.77
  4. Step 4: Simplify right side
    3,881.21x = 11,316,043.29
  5. Step 5: Solve for x
    x = 11,316,043.29/3,881.21
  6. Step 6: Final answer
    x = 2,915.60

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Find fourth proportional to 1,940.60, 2,678.02 and 1,056.38
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.