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Finding the Fourth Proportional to 21,048.74, 29,034.32 and 12,545

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Solution

The fourth proportional to 21,048.74, 29,034.32 and 12,545 is: 17,304.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.74 : 29,034.32 = 12,545 : x
  2. Step 2: Convert to fraction form
    21,048.74/29,034.32 = 12,545/x
  3. Step 3: Cross multiply
    21,048.74x = 29,034.32 × 12,545
  4. Step 4: Simplify right side
    21,048.74x = 364,235,544.40
  5. Step 5: Solve for x
    x = 364,235,544.40/21,048.74
  6. Step 6: Final answer
    x = 17,304.39

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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.