Home / 15,786.03-21,784.03-8,615.76

Finding the Fourth Proportional to 15,786.03, 21,784.03 and 8,615.76

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Solution

The fourth proportional to 15,786.03, 21,784.03 and 8,615.76 is: 11,889.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.03 : 21,784.03 = 8,615.76 : x
  2. Step 2: Convert to fraction form
    15,786.03/21,784.03 = 8,615.76/x
  3. Step 3: Cross multiply
    15,786.03x = 21,784.03 × 8,615.76
  4. Step 4: Simplify right side
    15,786.03x = 187,685,822.31
  5. Step 5: Solve for x
    x = 187,685,822.31/15,786.03
  6. Step 6: Final answer
    x = 11,889.37

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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.