Home / 43,412.12-65,128-13,831.64

Finding the Fourth Proportional to 43,412.12, 65,128 and 13,831.64

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Solution

The fourth proportional to 43,412.12, 65,128 and 13,831.64 is: 20,750.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,412.12 : 65,128 = 13,831.64 : x
  2. Step 2: Convert to fraction form
    43,412.12/65,128 = 13,831.64/x
  3. Step 3: Cross multiply
    43,412.12x = 65,128 × 13,831.64
  4. Step 4: Simplify right side
    43,412.12x = 900,827,049.92
  5. Step 5: Solve for x
    x = 900,827,049.92/43,412.12
  6. Step 6: Final answer
    x = 20,750.59

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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.