Home / 15,322.14-21,145.11-8,607.90

Finding the Fourth Proportional to 15,322.14, 21,145.11 and 8,607.90

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Solution

The fourth proportional to 15,322.14, 21,145.11 and 8,607.90 is: 11,879.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,322.14 : 21,145.11 = 8,607.90 : x
  2. Step 2: Convert to fraction form
    15,322.14/21,145.11 = 8,607.90/x
  3. Step 3: Cross multiply
    15,322.14x = 21,145.11 × 8,607.90
  4. Step 4: Simplify right side
    15,322.14x = 182,014,992.37
  5. Step 5: Solve for x
    x = 182,014,992.37/15,322.14
  6. Step 6: Final answer
    x = 11,879.21

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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.