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Finding the Fourth Proportional to 15,569.25, 21,486.03 and 8,855.84

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Solution

The fourth proportional to 15,569.25, 21,486.03 and 8,855.84 is: 12,221.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,569.25 : 21,486.03 = 8,855.84 : x
  2. Step 2: Convert to fraction form
    15,569.25/21,486.03 = 8,855.84/x
  3. Step 3: Cross multiply
    15,569.25x = 21,486.03 × 8,855.84
  4. Step 4: Simplify right side
    15,569.25x = 190,276,843.92
  5. Step 5: Solve for x
    x = 190,276,843.92/15,569.25
  6. Step 6: Final answer
    x = 12,221.32

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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.