Home / 20,872.98-31,308.35-6,831.23

Finding the Fourth Proportional to 20,872.98, 31,308.35 and 6,831.23

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Solution

The fourth proportional to 20,872.98, 31,308.35 and 6,831.23 is: 10,246.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.98 : 31,308.35 = 6,831.23 : x
  2. Step 2: Convert to fraction form
    20,872.98/31,308.35 = 6,831.23/x
  3. Step 3: Cross multiply
    20,872.98x = 31,308.35 × 6,831.23
  4. Step 4: Simplify right side
    20,872.98x = 213,874,349.07
  5. Step 5: Solve for x
    x = 213,874,349.07/20,872.98
  6. Step 6: Final answer
    x = 10,246.47

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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.