Home / 18,687.09-28,020.30-7,431.03

Finding the Fourth Proportional to 18,687.09, 28,020.30 and 7,431.03

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Solution

The fourth proportional to 18,687.09, 28,020.30 and 7,431.03 is: 11,142.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.09 : 28,020.30 = 7,431.03 : x
  2. Step 2: Convert to fraction form
    18,687.09/28,020.30 = 7,431.03/x
  3. Step 3: Cross multiply
    18,687.09x = 28,020.30 × 7,431.03
  4. Step 4: Simplify right side
    18,687.09x = 208,219,689.91
  5. Step 5: Solve for x
    x = 208,219,689.91/18,687.09
  6. Step 6: Final answer
    x = 11,142.44

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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.