Home / 3,904-5,386.72-2,645.28

Finding the Fourth Proportional to 3,904, 5,386.72 and 2,645.28

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Solution

The fourth proportional to 3,904, 5,386.72 and 2,645.28 is: 3,649.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904 : 5,386.72 = 2,645.28 : x
  2. Step 2: Convert to fraction form
    3,904/5,386.72 = 2,645.28/x
  3. Step 3: Cross multiply
    3,904x = 5,386.72 × 2,645.28
  4. Step 4: Simplify right side
    3,904x = 14,249,382.68
  5. Step 5: Solve for x
    x = 14,249,382.68/3,904
  6. Step 6: Final answer
    x = 3,649.94

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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.