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Finding the Fourth Proportional to 13,700.88, 18,907.56 and 8,398.62

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Solution

The fourth proportional to 13,700.88, 18,907.56 and 8,398.62 is: 11,590.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.88 : 18,907.56 = 8,398.62 : x
  2. Step 2: Convert to fraction form
    13,700.88/18,907.56 = 8,398.62/x
  3. Step 3: Cross multiply
    13,700.88x = 18,907.56 × 8,398.62
  4. Step 4: Simplify right side
    13,700.88x = 158,797,411.57
  5. Step 5: Solve for x
    x = 158,797,411.57/13,700.88
  6. Step 6: Final answer
    x = 11,590.31

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.