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Finding the Fourth Proportional to 18,018.54, 26,990.13 and 14,489.46

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Solution

The fourth proportional to 18,018.54, 26,990.13 and 14,489.46 is: 21,703.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,018.54 : 26,990.13 = 14,489.46 : x
  2. Step 2: Convert to fraction form
    18,018.54/26,990.13 = 14,489.46/x
  3. Step 3: Cross multiply
    18,018.54x = 26,990.13 × 14,489.46
  4. Step 4: Simplify right side
    18,018.54x = 391,072,409.03
  5. Step 5: Solve for x
    x = 391,072,409.03/18,018.54
  6. Step 6: Final answer
    x = 21,703.89

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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.