Home / 20,986.38-31,460.13-7,828.74

Finding the Fourth Proportional to 20,986.38, 31,460.13 and 7,828.74

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Solution

The fourth proportional to 20,986.38, 31,460.13 and 7,828.74 is: 11,735.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.38 : 31,460.13 = 7,828.74 : x
  2. Step 2: Convert to fraction form
    20,986.38/31,460.13 = 7,828.74/x
  3. Step 3: Cross multiply
    20,986.38x = 31,460.13 × 7,828.74
  4. Step 4: Simplify right side
    20,986.38x = 246,293,178.14
  5. Step 5: Solve for x
    x = 246,293,178.14/20,986.38
  6. Step 6: Final answer
    x = 11,735.86

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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.