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Finding the Fourth Proportional to 15,554.25, 21,464.87 and 9,965.61

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Solution

The fourth proportional to 15,554.25, 21,464.87 and 9,965.61 is: 13,752.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,554.25 : 21,464.87 = 9,965.61 : x
  2. Step 2: Convert to fraction form
    15,554.25/21,464.87 = 9,965.61/x
  3. Step 3: Cross multiply
    15,554.25x = 21,464.87 × 9,965.61
  4. Step 4: Simplify right side
    15,554.25x = 213,910,473.29
  5. Step 5: Solve for x
    x = 213,910,473.29/15,554.25
  6. Step 6: Final answer
    x = 13,752.54

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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.