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Finding the Fourth Proportional to 19,113.03, 26,379 and 11,159.91

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Solution

The fourth proportional to 19,113.03, 26,379 and 11,159.91 is: 15,402.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,113.03 : 26,379 = 11,159.91 : x
  2. Step 2: Convert to fraction form
    19,113.03/26,379 = 11,159.91/x
  3. Step 3: Cross multiply
    19,113.03x = 26,379 × 11,159.91
  4. Step 4: Simplify right side
    19,113.03x = 294,387,265.89
  5. Step 5: Solve for x
    x = 294,387,265.89/19,113.03
  6. Step 6: Final answer
    x = 15,402.44

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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.