Home / 18,817.40-28,237.30-7,131.80

Finding the Fourth Proportional to 18,817.40, 28,237.30 and 7,131.80

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Solution

The fourth proportional to 18,817.40, 28,237.30 and 7,131.80 is: 10,701.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.40 : 28,237.30 = 7,131.80 : x
  2. Step 2: Convert to fraction form
    18,817.40/28,237.30 = 7,131.80/x
  3. Step 3: Cross multiply
    18,817.40x = 28,237.30 × 7,131.80
  4. Step 4: Simplify right side
    18,817.40x = 201,382,776.14
  5. Step 5: Solve for x
    x = 201,382,776.14/18,817.40
  6. Step 6: Final answer
    x = 10,701.94

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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.