Home / 5,101.20-7,041.36-3,920.64

Finding the Fourth Proportional to 5,101.20, 7,041.36 and 3,920.64

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Solution

The fourth proportional to 5,101.20, 7,041.36 and 3,920.64 is: 5,411.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,101.20 : 7,041.36 = 3,920.64 : x
  2. Step 2: Convert to fraction form
    5,101.20/7,041.36 = 3,920.64/x
  3. Step 3: Cross multiply
    5,101.20x = 7,041.36 × 3,920.64
  4. Step 4: Simplify right side
    5,101.20x = 27,606,637.67
  5. Step 5: Solve for x
    x = 27,606,637.67/5,101.20
  6. Step 6: Final answer
    x = 5,411.79

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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.