Home / 3,915.84-5,402.79-2,519.40

Finding the Fourth Proportional to 3,915.84, 5,402.79 and 2,519.40

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Solution

The fourth proportional to 3,915.84, 5,402.79 and 2,519.40 is: 3,476.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.84 : 5,402.79 = 2,519.40 : x
  2. Step 2: Convert to fraction form
    3,915.84/5,402.79 = 2,519.40/x
  3. Step 3: Cross multiply
    3,915.84x = 5,402.79 × 2,519.40
  4. Step 4: Simplify right side
    3,915.84x = 13,611,789.13
  5. Step 5: Solve for x
    x = 13,611,789.13/3,915.84
  6. Step 6: Final answer
    x = 3,476.08

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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.