Home / 3,931.73-5,420.09-2,749.13

Finding the Fourth Proportional to 3,931.73, 5,420.09 and 2,749.13

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Solution

The fourth proportional to 3,931.73, 5,420.09 and 2,749.13 is: 3,789.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.73 : 5,420.09 = 2,749.13 : x
  2. Step 2: Convert to fraction form
    3,931.73/5,420.09 = 2,749.13/x
  3. Step 3: Cross multiply
    3,931.73x = 5,420.09 × 2,749.13
  4. Step 4: Simplify right side
    3,931.73x = 14,900,518.28
  5. Step 5: Solve for x
    x = 14,900,518.28/3,931.73
  6. Step 6: Final answer
    x = 3,789.81

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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.