Home / 7,718.72-11,577.20-2,172.51

Finding the Fourth Proportional to 7,718.72, 11,577.20 and 2,172.51

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Solution

The fourth proportional to 7,718.72, 11,577.20 and 2,172.51 is: 3,258.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,718.72 : 11,577.20 = 2,172.51 : x
  2. Step 2: Convert to fraction form
    7,718.72/11,577.20 = 2,172.51/x
  3. Step 3: Cross multiply
    7,718.72x = 11,577.20 × 2,172.51
  4. Step 4: Simplify right side
    7,718.72x = 25,151,571.91
  5. Step 5: Solve for x
    x = 25,151,571.91/7,718.72
  6. Step 6: Final answer
    x = 3,258.52

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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.