Home / 21,007.69-28,991.23-11,576.86

Finding the Fourth Proportional to 21,007.69, 28,991.23 and 11,576.86

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Solution

The fourth proportional to 21,007.69, 28,991.23 and 11,576.86 is: 15,976.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.69 : 28,991.23 = 11,576.86 : x
  2. Step 2: Convert to fraction form
    21,007.69/28,991.23 = 11,576.86/x
  3. Step 3: Cross multiply
    21,007.69x = 28,991.23 × 11,576.86
  4. Step 4: Simplify right side
    21,007.69x = 335,627,309.52
  5. Step 5: Solve for x
    x = 335,627,309.52/21,007.69
  6. Step 6: Final answer
    x = 15,976.40

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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.