Home / 21,564.80-29,756.64-12,131.54

Finding the Fourth Proportional to 21,564.80, 29,756.64 and 12,131.54

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Solution

The fourth proportional to 21,564.80, 29,756.64 and 12,131.54 is: 16,739.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,564.80 : 29,756.64 = 12,131.54 : x
  2. Step 2: Convert to fraction form
    21,564.80/29,756.64 = 12,131.54/x
  3. Step 3: Cross multiply
    21,564.80x = 29,756.64 × 12,131.54
  4. Step 4: Simplify right side
    21,564.80x = 360,993,868.43
  5. Step 5: Solve for x
    x = 360,993,868.43/21,564.80
  6. Step 6: Final answer
    x = 16,739.96

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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.