Home / 20,927.81-31,391.29-6,136.40

Finding the Fourth Proportional to 20,927.81, 31,391.29 and 6,136.40

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Solution

The fourth proportional to 20,927.81, 31,391.29 and 6,136.40 is: 9,204.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.81 : 31,391.29 = 6,136.40 : x
  2. Step 2: Convert to fraction form
    20,927.81/31,391.29 = 6,136.40/x
  3. Step 3: Cross multiply
    20,927.81x = 31,391.29 × 6,136.40
  4. Step 4: Simplify right side
    20,927.81x = 192,629,481.27
  5. Step 5: Solve for x
    x = 192,629,481.27/20,927.81
  6. Step 6: Final answer
    x = 9,204.47

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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.