Home / 3,915.95-5,403.88-2,147.51

Finding the Fourth Proportional to 3,915.95, 5,403.88 and 2,147.51

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Solution

The fourth proportional to 3,915.95, 5,403.88 and 2,147.51 is: 2,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.95 : 5,403.88 = 2,147.51 : x
  2. Step 2: Convert to fraction form
    3,915.95/5,403.88 = 2,147.51/x
  3. Step 3: Cross multiply
    3,915.95x = 5,403.88 × 2,147.51
  4. Step 4: Simplify right side
    3,915.95x = 11,604,902.53
  5. Step 5: Solve for x
    x = 11,604,902.53/3,915.95
  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.