Home / 3,894.90-5,374.78-2,126.53

Finding the Fourth Proportional to 3,894.90, 5,374.78 and 2,126.53

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Solution

The fourth proportional to 3,894.90, 5,374.78 and 2,126.53 is: 2,934.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.90 : 5,374.78 = 2,126.53 : x
  2. Step 2: Convert to fraction form
    3,894.90/5,374.78 = 2,126.53/x
  3. Step 3: Cross multiply
    3,894.90x = 5,374.78 × 2,126.53
  4. Step 4: Simplify right side
    3,894.90x = 11,429,630.91
  5. Step 5: Solve for x
    x = 11,429,630.91/3,894.90
  6. Step 6: Final answer
    x = 2,934.51

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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.