Home / 20,755.22-28,634.04-12,783.60

Finding the Fourth Proportional to 20,755.22, 28,634.04 and 12,783.60

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Solution

The fourth proportional to 20,755.22, 28,634.04 and 12,783.60 is: 17,636.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.22 : 28,634.04 = 12,783.60 : x
  2. Step 2: Convert to fraction form
    20,755.22/28,634.04 = 12,783.60/x
  3. Step 3: Cross multiply
    20,755.22x = 28,634.04 × 12,783.60
  4. Step 4: Simplify right side
    20,755.22x = 366,046,113.74
  5. Step 5: Solve for x
    x = 366,046,113.74/20,755.22
  6. Step 6: Final answer
    x = 17,636.34

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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.