Home / 20,427.82-28,189.64-12,483.34

Finding the Fourth Proportional to 20,427.82, 28,189.64 and 12,483.34

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Solution

The fourth proportional to 20,427.82, 28,189.64 and 12,483.34 is: 17,226.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.82 : 28,189.64 = 12,483.34 : x
  2. Step 2: Convert to fraction form
    20,427.82/28,189.64 = 12,483.34/x
  3. Step 3: Cross multiply
    20,427.82x = 28,189.64 × 12,483.34
  4. Step 4: Simplify right side
    20,427.82x = 351,900,860.60
  5. Step 5: Solve for x
    x = 351,900,860.60/20,427.82
  6. Step 6: Final answer
    x = 17,226.55

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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.