Home / 3,915.56-5,403.49-2,147.13

Finding the Fourth Proportional to 3,915.56, 5,403.49 and 2,147.13

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Solution

The fourth proportional to 3,915.56, 5,403.49 and 2,147.13 is: 2,963.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.56 : 5,403.49 = 2,147.13 : x
  2. Step 2: Convert to fraction form
    3,915.56/5,403.49 = 2,147.13/x
  3. Step 3: Cross multiply
    3,915.56x = 5,403.49 × 2,147.13
  4. Step 4: Simplify right side
    3,915.56x = 11,601,990.12
  5. Step 5: Solve for x
    x = 11,601,990.12/3,915.56
  6. Step 6: Final answer
    x = 2,963.05

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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.