Home / 20,427.48-30,662.70-18,102.39

Finding the Fourth Proportional to 20,427.48, 30,662.70 and 18,102.39

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Solution

The fourth proportional to 20,427.48, 30,662.70 and 18,102.39 is: 27,172.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.48 : 30,662.70 = 18,102.39 : x
  2. Step 2: Convert to fraction form
    20,427.48/30,662.70 = 18,102.39/x
  3. Step 3: Cross multiply
    20,427.48x = 30,662.70 × 18,102.39
  4. Step 4: Simplify right side
    20,427.48x = 555,068,153.85
  5. Step 5: Solve for x
    x = 555,068,153.85/20,427.48
  6. Step 6: Final answer
    x = 27,172.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.