Home / 3,935.19-5,430.45-2,166.55

Finding the Fourth Proportional to 3,935.19, 5,430.45 and 2,166.55

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Solution

The fourth proportional to 3,935.19, 5,430.45 and 2,166.55 is: 2,989.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.19 : 5,430.45 = 2,166.55 : x
  2. Step 2: Convert to fraction form
    3,935.19/5,430.45 = 2,166.55/x
  3. Step 3: Cross multiply
    3,935.19x = 5,430.45 × 2,166.55
  4. Step 4: Simplify right side
    3,935.19x = 11,765,341.45
  5. Step 5: Solve for x
    x = 11,765,341.45/3,935.19
  6. Step 6: Final answer
    x = 2,989.78

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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.