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Finding the Fourth Proportional to 15,609.69, 21,538.92 and 8,895.60

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Solution

The fourth proportional to 15,609.69, 21,538.92 and 8,895.60 is: 12,274.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,609.69 : 21,538.92 = 8,895.60 : x
  2. Step 2: Convert to fraction form
    15,609.69/21,538.92 = 8,895.60/x
  3. Step 3: Cross multiply
    15,609.69x = 21,538.92 × 8,895.60
  4. Step 4: Simplify right side
    15,609.69x = 191,601,616.75
  5. Step 5: Solve for x
    x = 191,601,616.75/15,609.69
  6. Step 6: Final answer
    x = 12,274.53

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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.