Home / 19,890.09-29,831.46-8,040.75

Finding the Fourth Proportional to 19,890.09, 29,831.46 and 8,040.75

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Solution

The fourth proportional to 19,890.09, 29,831.46 and 8,040.75 is: 12,059.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.09 : 29,831.46 = 8,040.75 : x
  2. Step 2: Convert to fraction form
    19,890.09/29,831.46 = 8,040.75/x
  3. Step 3: Cross multiply
    19,890.09x = 29,831.46 × 8,040.75
  4. Step 4: Simplify right side
    19,890.09x = 239,867,312.00
  5. Step 5: Solve for x
    x = 239,867,312.00/19,890.09
  6. Step 6: Final answer
    x = 12,059.64

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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.