Home / 15,739.76-21,720.03-8,664.81

Finding the Fourth Proportional to 15,739.76, 21,720.03 and 8,664.81

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Solution

The fourth proportional to 15,739.76, 21,720.03 and 8,664.81 is: 11,956.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.76 : 21,720.03 = 8,664.81 : x
  2. Step 2: Convert to fraction form
    15,739.76/21,720.03 = 8,664.81/x
  3. Step 3: Cross multiply
    15,739.76x = 21,720.03 × 8,664.81
  4. Step 4: Simplify right side
    15,739.76x = 188,199,933.14
  5. Step 5: Solve for x
    x = 188,199,933.14/15,739.76
  6. Step 6: Final answer
    x = 11,956.98

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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.