Home / 3,915.06-5,402.71-2,122.49

Finding the Fourth Proportional to 3,915.06, 5,402.71 and 2,122.49

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Solution

The fourth proportional to 3,915.06, 5,402.71 and 2,122.49 is: 2,929.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.06 : 5,402.71 = 2,122.49 : x
  2. Step 2: Convert to fraction form
    3,915.06/5,402.71 = 2,122.49/x
  3. Step 3: Cross multiply
    3,915.06x = 5,402.71 × 2,122.49
  4. Step 4: Simplify right side
    3,915.06x = 11,467,197.95
  5. Step 5: Solve for x
    x = 11,467,197.95/3,915.06
  6. Step 6: Final answer
    x = 2,929.00

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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.