Home / 3,945.77-5,445-2,177.35

Finding the Fourth Proportional to 3,945.77, 5,445 and 2,177.35

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Solution

The fourth proportional to 3,945.77, 5,445 and 2,177.35 is: 3,004.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.77 : 5,445 = 2,177.35 : x
  2. Step 2: Convert to fraction form
    3,945.77/5,445 = 2,177.35/x
  3. Step 3: Cross multiply
    3,945.77x = 5,445 × 2,177.35
  4. Step 4: Simplify right side
    3,945.77x = 11,855,670.75
  5. Step 5: Solve for x
    x = 11,855,670.75/3,945.77
  6. Step 6: Final answer
    x = 3,004.66

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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.