Home / 3,928.54-5,421.63-2,749.99

Finding the Fourth Proportional to 3,928.54, 5,421.63 and 2,749.99

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Solution

The fourth proportional to 3,928.54, 5,421.63 and 2,749.99 is: 3,795.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.54 : 5,421.63 = 2,749.99 : x
  2. Step 2: Convert to fraction form
    3,928.54/5,421.63 = 2,749.99/x
  3. Step 3: Cross multiply
    3,928.54x = 5,421.63 × 2,749.99
  4. Step 4: Simplify right side
    3,928.54x = 14,909,428.28
  5. Step 5: Solve for x
    x = 14,909,428.28/3,928.54
  6. Step 6: Final answer
    x = 3,795.16

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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.