Home / 20,590.14-28,415.94-11,516.28

Finding the Fourth Proportional to 20,590.14, 28,415.94 and 11,516.28

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Solution

The fourth proportional to 20,590.14, 28,415.94 and 11,516.28 is: 15,893.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.14 : 28,415.94 = 11,516.28 : x
  2. Step 2: Convert to fraction form
    20,590.14/28,415.94 = 11,516.28/x
  3. Step 3: Cross multiply
    20,590.14x = 28,415.94 × 11,516.28
  4. Step 4: Simplify right side
    20,590.14x = 327,245,921.50
  5. Step 5: Solve for x
    x = 327,245,921.50/20,590.14
  6. Step 6: Final answer
    x = 15,893.33

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1.5x scale

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.