Home / 20,986.04-31,478.03-7,837.38

Finding the Fourth Proportional to 20,986.04, 31,478.03 and 7,837.38

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Solution

The fourth proportional to 20,986.04, 31,478.03 and 7,837.38 is: 11,755.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.04 : 31,478.03 = 7,837.38 : x
  2. Step 2: Convert to fraction form
    20,986.04/31,478.03 = 7,837.38/x
  3. Step 3: Cross multiply
    20,986.04x = 31,478.03 × 7,837.38
  4. Step 4: Simplify right side
    20,986.04x = 246,705,372.52
  5. Step 5: Solve for x
    x = 246,705,372.52/20,986.04
  6. Step 6: Final answer
    x = 11,755.69

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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.