Home / 18,985.57-28,469.49-11,090.37

Finding the Fourth Proportional to 18,985.57, 28,469.49 and 11,090.37

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Solution

The fourth proportional to 18,985.57, 28,469.49 and 11,090.37 is: 16,630.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.57 : 28,469.49 = 11,090.37 : x
  2. Step 2: Convert to fraction form
    18,985.57/28,469.49 = 11,090.37/x
  3. Step 3: Cross multiply
    18,985.57x = 28,469.49 × 11,090.37
  4. Step 4: Simplify right side
    18,985.57x = 315,737,177.81
  5. Step 5: Solve for x
    x = 315,737,177.81/18,985.57
  6. Step 6: Final answer
    x = 16,630.38

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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.