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Finding the Fourth Proportional to 12,808.08, 17,673.12 and 7,218

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Solution

The fourth proportional to 12,808.08, 17,673.12 and 7,218 is: 9,959.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.08 : 17,673.12 = 7,218 : x
  2. Step 2: Convert to fraction form
    12,808.08/17,673.12 = 7,218/x
  3. Step 3: Cross multiply
    12,808.08x = 17,673.12 × 7,218
  4. Step 4: Simplify right side
    12,808.08x = 127,564,580.16
  5. Step 5: Solve for x
    x = 127,564,580.16/12,808.08
  6. Step 6: Final answer
    x = 9,959.70

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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.