Home / 20,749.46-31,143.63-9,663.80

Finding the Fourth Proportional to 20,749.46, 31,143.63 and 9,663.80

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Solution

The fourth proportional to 20,749.46, 31,143.63 and 9,663.80 is: 14,504.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.46 : 31,143.63 = 9,663.80 : x
  2. Step 2: Convert to fraction form
    20,749.46/31,143.63 = 9,663.80/x
  3. Step 3: Cross multiply
    20,749.46x = 31,143.63 × 9,663.80
  4. Step 4: Simplify right side
    20,749.46x = 300,965,811.59
  5. Step 5: Solve for x
    x = 300,965,811.59/20,749.46
  6. Step 6: Final answer
    x = 14,504.75

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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.