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Finding the Fourth Proportional to 19,489.49, 26,889.11 and 11,927.93

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Solution

The fourth proportional to 19,489.49, 26,889.11 and 11,927.93 is: 16,456.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.49 : 26,889.11 = 11,927.93 : x
  2. Step 2: Convert to fraction form
    19,489.49/26,889.11 = 11,927.93/x
  3. Step 3: Cross multiply
    19,489.49x = 26,889.11 × 11,927.93
  4. Step 4: Simplify right side
    19,489.49x = 320,731,421.84
  5. Step 5: Solve for x
    x = 320,731,421.84/19,489.49
  6. Step 6: Final answer
    x = 16,456.63

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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.