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Finding the Fourth Proportional to 12,716, 17,549.16 and 7,128.08

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Solution

The fourth proportional to 12,716, 17,549.16 and 7,128.08 is: 9,837.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,716 : 17,549.16 = 7,128.08 : x
  2. Step 2: Convert to fraction form
    12,716/17,549.16 = 7,128.08/x
  3. Step 3: Cross multiply
    12,716x = 17,549.16 × 7,128.08
  4. Step 4: Simplify right side
    12,716x = 125,091,816.41
  5. Step 5: Solve for x
    x = 125,091,816.41/12,716
  6. Step 6: Final answer
    x = 9,837.36

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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.