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Finding the Fourth Proportional to 18,984.89, 26,211.47 and 16,991.99

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Solution

The fourth proportional to 18,984.89, 26,211.47 and 16,991.99 is: 23,459.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.89 : 26,211.47 = 16,991.99 : x
  2. Step 2: Convert to fraction form
    18,984.89/26,211.47 = 16,991.99/x
  3. Step 3: Cross multiply
    18,984.89x = 26,211.47 × 16,991.99
  4. Step 4: Simplify right side
    18,984.89x = 445,384,951.17
  5. Step 5: Solve for x
    x = 445,384,951.17/18,984.89
  6. Step 6: Final answer
    x = 23,459.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.