Home / 20,664.45-28,516.64-11,711.79

Finding the Fourth Proportional to 20,664.45, 28,516.64 and 11,711.79

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Solution

The fourth proportional to 20,664.45, 28,516.64 and 11,711.79 is: 16,162.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.45 : 28,516.64 = 11,711.79 : x
  2. Step 2: Convert to fraction form
    20,664.45/28,516.64 = 11,711.79/x
  3. Step 3: Cross multiply
    20,664.45x = 28,516.64 × 11,711.79
  4. Step 4: Simplify right side
    20,664.45x = 333,980,840.63
  5. Step 5: Solve for x
    x = 333,980,840.63/20,664.45
  6. Step 6: Final answer
    x = 16,162.10

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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.