Home / 9,139.64-13,713.44-3,878.28

Finding the Fourth Proportional to 9,139.64, 13,713.44 and 3,878.28

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Solution

The fourth proportional to 9,139.64, 13,713.44 and 3,878.28 is: 5,819.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.64 : 13,713.44 = 3,878.28 : x
  2. Step 2: Convert to fraction form
    9,139.64/13,713.44 = 3,878.28/x
  3. Step 3: Cross multiply
    9,139.64x = 13,713.44 × 3,878.28
  4. Step 4: Simplify right side
    9,139.64x = 53,184,540.69
  5. Step 5: Solve for x
    x = 53,184,540.69/9,139.64
  6. Step 6: Final answer
    x = 5,819.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.