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Finding the Fourth Proportional to 19,553.25, 26,981.47 and 11,999.90

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Solution

The fourth proportional to 19,553.25, 26,981.47 and 11,999.90 is: 16,558.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,553.25 : 26,981.47 = 11,999.90 : x
  2. Step 2: Convert to fraction form
    19,553.25/26,981.47 = 11,999.90/x
  3. Step 3: Cross multiply
    19,553.25x = 26,981.47 × 11,999.90
  4. Step 4: Simplify right side
    19,553.25x = 323,775,009.31
  5. Step 5: Solve for x
    x = 323,775,009.31/19,553.25
  6. Step 6: Final answer
    x = 16,558.63

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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.