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Finding the Fourth Proportional to 21,272.94, 29,356.62 and 12,320.88

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Solution

The fourth proportional to 21,272.94, 29,356.62 and 12,320.88 is: 17,002.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.94 : 29,356.62 = 12,320.88 : x
  2. Step 2: Convert to fraction form
    21,272.94/29,356.62 = 12,320.88/x
  3. Step 3: Cross multiply
    21,272.94x = 29,356.62 × 12,320.88
  4. Step 4: Simplify right side
    21,272.94x = 361,699,392.23
  5. Step 5: Solve for x
    x = 361,699,392.23/21,272.94
  6. Step 6: Final answer
    x = 17,002.79

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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.