Home / 3,915.94-5,403.90-2,147.50

Finding the Fourth Proportional to 3,915.94, 5,403.90 and 2,147.50

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Solution

The fourth proportional to 3,915.94, 5,403.90 and 2,147.50 is: 2,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.94 : 5,403.90 = 2,147.50 : x
  2. Step 2: Convert to fraction form
    3,915.94/5,403.90 = 2,147.50/x
  3. Step 3: Cross multiply
    3,915.94x = 5,403.90 × 2,147.50
  4. Step 4: Simplify right side
    3,915.94x = 11,604,875.25
  5. Step 5: Solve for x
    x = 11,604,875.25/3,915.94
  6. Step 6: Final answer
    x = 2,963.50

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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.