Home / 7,811.20-10,772.43-5,161.28

Finding the Fourth Proportional to 7,811.20, 10,772.43 and 5,161.28

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Solution

The fourth proportional to 7,811.20, 10,772.43 and 5,161.28 is: 7,117.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.20 : 10,772.43 = 5,161.28 : x
  2. Step 2: Convert to fraction form
    7,811.20/10,772.43 = 5,161.28/x
  3. Step 3: Cross multiply
    7,811.20x = 10,772.43 × 5,161.28
  4. Step 4: Simplify right side
    7,811.20x = 55,599,527.51
  5. Step 5: Solve for x
    x = 55,599,527.51/7,811.20
  6. Step 6: Final answer
    x = 7,117.93

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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.