Home / 20,555.75-28,367.21-11,124.31

Finding the Fourth Proportional to 20,555.75, 28,367.21 and 11,124.31

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Solution

The fourth proportional to 20,555.75, 28,367.21 and 11,124.31 is: 15,351.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.75 : 28,367.21 = 11,124.31 : x
  2. Step 2: Convert to fraction form
    20,555.75/28,367.21 = 11,124.31/x
  3. Step 3: Cross multiply
    20,555.75x = 28,367.21 × 11,124.31
  4. Step 4: Simplify right side
    20,555.75x = 315,565,727.74
  5. Step 5: Solve for x
    x = 315,565,727.74/20,555.75
  6. Step 6: Final answer
    x = 15,351.70

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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.