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Finding the Fourth Proportional to 2,877.93, 3,971.97 and 2,130.84

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Solution

The fourth proportional to 2,877.93, 3,971.97 and 2,130.84 is: 2,940.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,877.93 : 3,971.97 = 2,130.84 : x
  2. Step 2: Convert to fraction form
    2,877.93/3,971.97 = 2,130.84/x
  3. Step 3: Cross multiply
    2,877.93x = 3,971.97 × 2,130.84
  4. Step 4: Simplify right side
    2,877.93x = 8,463,632.55
  5. Step 5: Solve for x
    x = 8,463,632.55/2,877.93
  6. Step 6: Final answer
    x = 2,940.88

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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.