Home / 18,717.36-28,060.80-7,629.20

Finding the Fourth Proportional to 18,717.36, 28,060.80 and 7,629.20

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Solution

The fourth proportional to 18,717.36, 28,060.80 and 7,629.20 is: 11,437.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,717.36 : 28,060.80 = 7,629.20 : x
  2. Step 2: Convert to fraction form
    18,717.36/28,060.80 = 7,629.20/x
  3. Step 3: Cross multiply
    18,717.36x = 28,060.80 × 7,629.20
  4. Step 4: Simplify right side
    18,717.36x = 214,081,455.36
  5. Step 5: Solve for x
    x = 214,081,455.36/18,717.36
  6. Step 6: Final answer
    x = 11,437.59

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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.