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Finding the Fourth Proportional to 18,998.99, 28,503.44 and 11,108.25

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Solution

The fourth proportional to 18,998.99, 28,503.44 and 11,108.25 is: 16,665.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.99 : 28,503.44 = 11,108.25 : x
  2. Step 2: Convert to fraction form
    18,998.99/28,503.44 = 11,108.25/x
  3. Step 3: Cross multiply
    18,998.99x = 28,503.44 × 11,108.25
  4. Step 4: Simplify right side
    18,998.99x = 316,623,323.49
  5. Step 5: Solve for x
    x = 316,623,323.49/18,998.99
  6. Step 6: Final answer
    x = 16,665.27

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Double scale
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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.