Home / 20,945.09-31,409.37-8,462.76

Finding the Fourth Proportional to 20,945.09, 31,409.37 and 8,462.76

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Solution

The fourth proportional to 20,945.09, 31,409.37 and 8,462.76 is: 12,690.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.09 : 31,409.37 = 8,462.76 : x
  2. Step 2: Convert to fraction form
    20,945.09/31,409.37 = 8,462.76/x
  3. Step 3: Cross multiply
    20,945.09x = 31,409.37 × 8,462.76
  4. Step 4: Simplify right side
    20,945.09x = 265,809,960.06
  5. Step 5: Solve for x
    x = 265,809,960.06/20,945.09
  6. Step 6: Final answer
    x = 12,690.80

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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.