Home / 3,904.86-5,384.12-3,156.51

Finding the Fourth Proportional to 3,904.86, 5,384.12 and 3,156.51

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Solution

The fourth proportional to 3,904.86, 5,384.12 and 3,156.51 is: 4,352.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.86 : 5,384.12 = 3,156.51 : x
  2. Step 2: Convert to fraction form
    3,904.86/5,384.12 = 3,156.51/x
  3. Step 3: Cross multiply
    3,904.86x = 5,384.12 × 3,156.51
  4. Step 4: Simplify right side
    3,904.86x = 16,995,028.62
  5. Step 5: Solve for x
    x = 16,995,028.62/3,904.86
  6. Step 6: Final answer
    x = 4,352.28

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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.