Home / 3,918.56-5,407.63-2,126.05

Finding the Fourth Proportional to 3,918.56, 5,407.63 and 2,126.05

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Solution

The fourth proportional to 3,918.56, 5,407.63 and 2,126.05 is: 2,933.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.56 : 5,407.63 = 2,126.05 : x
  2. Step 2: Convert to fraction form
    3,918.56/5,407.63 = 2,126.05/x
  3. Step 3: Cross multiply
    3,918.56x = 5,407.63 × 2,126.05
  4. Step 4: Simplify right side
    3,918.56x = 11,496,872.93
  5. Step 5: Solve for x
    x = 11,496,872.93/3,918.56
  6. Step 6: Final answer
    x = 2,933.96

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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.