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Finding the Fourth Proportional to 19,045.25, 26,285.54 and 11,388

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Solution

The fourth proportional to 19,045.25, 26,285.54 and 11,388 is: 15,717.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,045.25 : 26,285.54 = 11,388 : x
  2. Step 2: Convert to fraction form
    19,045.25/26,285.54 = 11,388/x
  3. Step 3: Cross multiply
    19,045.25x = 26,285.54 × 11,388
  4. Step 4: Simplify right side
    19,045.25x = 299,339,672.58
  5. Step 5: Solve for x
    x = 299,339,672.58/19,045.25
  6. Step 6: Final answer
    x = 15,717.29

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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.