Home / 20,661.08-28,516.42-12,275.96

Finding the Fourth Proportional to 20,661.08, 28,516.42 and 12,275.96

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Solution

The fourth proportional to 20,661.08, 28,516.42 and 12,275.96 is: 16,943.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.08 : 28,516.42 = 12,275.96 : x
  2. Step 2: Convert to fraction form
    20,661.08/28,516.42 = 12,275.96/x
  3. Step 3: Cross multiply
    20,661.08x = 28,516.42 × 12,275.96
  4. Step 4: Simplify right side
    20,661.08x = 350,066,431.26
  5. Step 5: Solve for x
    x = 350,066,431.26/20,661.08
  6. Step 6: Final answer
    x = 16,943.28

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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.