Home / 20,584.25-28,406.34-11,152.80

Finding the Fourth Proportional to 20,584.25, 28,406.34 and 11,152.80

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Solution

The fourth proportional to 20,584.25, 28,406.34 and 11,152.80 is: 15,390.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.25 : 28,406.34 = 11,152.80 : x
  2. Step 2: Convert to fraction form
    20,584.25/28,406.34 = 11,152.80/x
  3. Step 3: Cross multiply
    20,584.25x = 28,406.34 × 11,152.80
  4. Step 4: Simplify right side
    20,584.25x = 316,810,228.75
  5. Step 5: Solve for x
    x = 316,810,228.75/20,584.25
  6. Step 6: Final answer
    x = 15,390.91

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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.