Home / 20,708.96-28,579.20-12,326.72

Finding the Fourth Proportional to 20,708.96, 28,579.20 and 12,326.72

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Solution

The fourth proportional to 20,708.96, 28,579.20 and 12,326.72 is: 17,011.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.96 : 28,579.20 = 12,326.72 : x
  2. Step 2: Convert to fraction form
    20,708.96/28,579.20 = 12,326.72/x
  3. Step 3: Cross multiply
    20,708.96x = 28,579.20 × 12,326.72
  4. Step 4: Simplify right side
    20,708.96x = 352,287,796.22
  5. Step 5: Solve for x
    x = 352,287,796.22/20,708.96
  6. Step 6: Final answer
    x = 17,011.37

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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.