Home / 20,903.69-31,356.56-8,422.03

Finding the Fourth Proportional to 20,903.69, 31,356.56 and 8,422.03

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Solution

The fourth proportional to 20,903.69, 31,356.56 and 8,422.03 is: 12,633.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.69 : 31,356.56 = 8,422.03 : x
  2. Step 2: Convert to fraction form
    20,903.69/31,356.56 = 8,422.03/x
  3. Step 3: Cross multiply
    20,903.69x = 31,356.56 × 8,422.03
  4. Step 4: Simplify right side
    20,903.69x = 264,085,831.68
  5. Step 5: Solve for x
    x = 264,085,831.68/20,903.69
  6. Step 6: Final answer
    x = 12,633.45

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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.