Home / 13,831.43-20,749.32-7,165.85

Finding the Fourth Proportional to 13,831.43, 20,749.32 and 7,165.85

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Solution

The fourth proportional to 13,831.43, 20,749.32 and 7,165.85 is: 10,749.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.43 : 20,749.32 = 7,165.85 : x
  2. Step 2: Convert to fraction form
    13,831.43/20,749.32 = 7,165.85/x
  3. Step 3: Cross multiply
    13,831.43x = 20,749.32 × 7,165.85
  4. Step 4: Simplify right side
    13,831.43x = 148,686,410.98
  5. Step 5: Solve for x
    x = 148,686,410.98/13,831.43
  6. Step 6: Final answer
    x = 10,749.90

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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.