Home / 20,958.43-31,430.97-6,915.84

Finding the Fourth Proportional to 20,958.43, 31,430.97 and 6,915.84

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Solution

The fourth proportional to 20,958.43, 31,430.97 and 6,915.84 is: 10,371.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.43 : 31,430.97 = 6,915.84 : x
  2. Step 2: Convert to fraction form
    20,958.43/31,430.97 = 6,915.84/x
  3. Step 3: Cross multiply
    20,958.43x = 31,430.97 × 6,915.84
  4. Step 4: Simplify right side
    20,958.43x = 217,371,463.80
  5. Step 5: Solve for x
    x = 217,371,463.80/20,958.43
  6. Step 6: Final answer
    x = 10,371.55

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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.