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Finding the Fourth Proportional to 17,645.90, 26,445.48 and 12,943.89

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Solution

The fourth proportional to 17,645.90, 26,445.48 and 12,943.89 is: 19,398.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,645.90 : 26,445.48 = 12,943.89 : x
  2. Step 2: Convert to fraction form
    17,645.90/26,445.48 = 12,943.89/x
  3. Step 3: Cross multiply
    17,645.90x = 26,445.48 × 12,943.89
  4. Step 4: Simplify right side
    17,645.90x = 342,307,384.12
  5. Step 5: Solve for x
    x = 342,307,384.12/17,645.90
  6. Step 6: Final answer
    x = 19,398.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.