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Finding the Fourth Proportional to 15,636.63, 21,578.97 and 8,563.51

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Solution

The fourth proportional to 15,636.63, 21,578.97 and 8,563.51 is: 11,817.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,636.63 : 21,578.97 = 8,563.51 : x
  2. Step 2: Convert to fraction form
    15,636.63/21,578.97 = 8,563.51/x
  3. Step 3: Cross multiply
    15,636.63x = 21,578.97 × 8,563.51
  4. Step 4: Simplify right side
    15,636.63x = 184,791,725.38
  5. Step 5: Solve for x
    x = 184,791,725.38/15,636.63
  6. Step 6: Final answer
    x = 11,817.87

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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.