Home / 20,940.08-31,384.55-9,831.93

Finding the Fourth Proportional to 20,940.08, 31,384.55 and 9,831.93

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Solution

The fourth proportional to 20,940.08, 31,384.55 and 9,831.93 is: 14,735.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.08 : 31,384.55 = 9,831.93 : x
  2. Step 2: Convert to fraction form
    20,940.08/31,384.55 = 9,831.93/x
  3. Step 3: Cross multiply
    20,940.08x = 31,384.55 × 9,831.93
  4. Step 4: Simplify right side
    20,940.08x = 308,570,649.52
  5. Step 5: Solve for x
    x = 308,570,649.52/20,940.08
  6. Step 6: Final answer
    x = 14,735.89

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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.