Home / 3,915.07-5,403.78-2,639.15

Finding the Fourth Proportional to 3,915.07, 5,403.78 and 2,639.15

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Solution

The fourth proportional to 3,915.07, 5,403.78 and 2,639.15 is: 3,642.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.07 : 5,403.78 = 2,639.15 : x
  2. Step 2: Convert to fraction form
    3,915.07/5,403.78 = 2,639.15/x
  3. Step 3: Cross multiply
    3,915.07x = 5,403.78 × 2,639.15
  4. Step 4: Simplify right side
    3,915.07x = 14,261,379.23
  5. Step 5: Solve for x
    x = 14,261,379.23/3,915.07
  6. Step 6: Final answer
    x = 3,642.69

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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.