Home / 3,915.08-5,402.78-2,146.65

Finding the Fourth Proportional to 3,915.08, 5,402.78 and 2,146.65

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Solution

The fourth proportional to 3,915.08, 5,402.78 and 2,146.65 is: 2,962.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.08 : 5,402.78 = 2,146.65 : x
  2. Step 2: Convert to fraction form
    3,915.08/5,402.78 = 2,146.65/x
  3. Step 3: Cross multiply
    3,915.08x = 5,402.78 × 2,146.65
  4. Step 4: Simplify right side
    3,915.08x = 11,597,866.95
  5. Step 5: Solve for x
    x = 11,597,866.95/3,915.08
  6. Step 6: Final answer
    x = 2,962.36

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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.