Home / 20,705.08-31,072.20-13,327.60

Finding the Fourth Proportional to 20,705.08, 31,072.20 and 13,327.60

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Solution

The fourth proportional to 20,705.08, 31,072.20 and 13,327.60 is: 20,000.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.08 : 31,072.20 = 13,327.60 : x
  2. Step 2: Convert to fraction form
    20,705.08/31,072.20 = 13,327.60/x
  3. Step 3: Cross multiply
    20,705.08x = 31,072.20 × 13,327.60
  4. Step 4: Simplify right side
    20,705.08x = 414,117,852.72
  5. Step 5: Solve for x
    x = 414,117,852.72/20,705.08
  6. Step 6: Final answer
    x = 20,000.78

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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.