Home / 3,126.72-4,315.44-1,948.56

Finding the Fourth Proportional to 3,126.72, 4,315.44 and 1,948.56

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Solution

The fourth proportional to 3,126.72, 4,315.44 and 1,948.56 is: 2,689.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.72 : 4,315.44 = 1,948.56 : x
  2. Step 2: Convert to fraction form
    3,126.72/4,315.44 = 1,948.56/x
  3. Step 3: Cross multiply
    3,126.72x = 4,315.44 × 1,948.56
  4. Step 4: Simplify right side
    3,126.72x = 8,408,893.77
  5. Step 5: Solve for x
    x = 8,408,893.77/3,126.72
  6. Step 6: Final answer
    x = 2,689.37

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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.