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Finding the Fourth Proportional to 12,805.08, 17,679.08 and 9,815.28

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Solution

The fourth proportional to 12,805.08, 17,679.08 and 9,815.28 is: 13,551.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,805.08 : 17,679.08 = 9,815.28 : x
  2. Step 2: Convert to fraction form
    12,805.08/17,679.08 = 9,815.28/x
  3. Step 3: Cross multiply
    12,805.08x = 17,679.08 × 9,815.28
  4. Step 4: Simplify right side
    12,805.08x = 173,525,120.34
  5. Step 5: Solve for x
    x = 173,525,120.34/12,805.08
  6. Step 6: Final answer
    x = 13,551.27

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1.5x scale

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.