Home / 20,730.90-28,609.37-11,778.12

Finding the Fourth Proportional to 20,730.90, 28,609.37 and 11,778.12

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Solution

The fourth proportional to 20,730.90, 28,609.37 and 11,778.12 is: 16,254.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.90 : 28,609.37 = 11,778.12 : x
  2. Step 2: Convert to fraction form
    20,730.90/28,609.37 = 11,778.12/x
  3. Step 3: Cross multiply
    20,730.90x = 28,609.37 × 11,778.12
  4. Step 4: Simplify right side
    20,730.90x = 336,964,534.09
  5. Step 5: Solve for x
    x = 336,964,534.09/20,730.90
  6. Step 6: Final answer
    x = 16,254.22

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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.