Home / 20,809.20-31,242.60-16,431.60

Finding the Fourth Proportional to 20,809.20, 31,242.60 and 16,431.60

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Solution

The fourth proportional to 20,809.20, 31,242.60 and 16,431.60 is: 24,670.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.20 : 31,242.60 = 16,431.60 : x
  2. Step 2: Convert to fraction form
    20,809.20/31,242.60 = 16,431.60/x
  3. Step 3: Cross multiply
    20,809.20x = 31,242.60 × 16,431.60
  4. Step 4: Simplify right side
    20,809.20x = 513,365,906.16
  5. Step 5: Solve for x
    x = 513,365,906.16/20,809.20
  6. Step 6: Final answer
    x = 24,670.14

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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.