Home / 20,890.26-28,828.56-11,458.86

Finding the Fourth Proportional to 20,890.26, 28,828.56 and 11,458.86

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Solution

The fourth proportional to 20,890.26, 28,828.56 and 11,458.86 is: 15,813.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.26 : 28,828.56 = 11,458.86 : x
  2. Step 2: Convert to fraction form
    20,890.26/28,828.56 = 11,458.86/x
  3. Step 3: Cross multiply
    20,890.26x = 28,828.56 × 11,458.86
  4. Step 4: Simplify right side
    20,890.26x = 330,342,433.04
  5. Step 5: Solve for x
    x = 330,342,433.04/20,890.26
  6. Step 6: Final answer
    x = 15,813.23

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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.