Home / 20,739.32-31,097.44-12,309.25

Finding the Fourth Proportional to 20,739.32, 31,097.44 and 12,309.25

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Solution

The fourth proportional to 20,739.32, 31,097.44 and 12,309.25 is: 18,457.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.32 : 31,097.44 = 12,309.25 : x
  2. Step 2: Convert to fraction form
    20,739.32/31,097.44 = 12,309.25/x
  3. Step 3: Cross multiply
    20,739.32x = 31,097.44 × 12,309.25
  4. Step 4: Simplify right side
    20,739.32x = 382,786,163.32
  5. Step 5: Solve for x
    x = 382,786,163.32/20,739.32
  6. Step 6: Final answer
    x = 18,457.03

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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.