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Finding the Fourth Proportional to 13,596.76, 20,395.14 and 8,661.43

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Solution

The fourth proportional to 13,596.76, 20,395.14 and 8,661.43 is: 12,992.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,596.76 : 20,395.14 = 8,661.43 : x
  2. Step 2: Convert to fraction form
    13,596.76/20,395.14 = 8,661.43/x
  3. Step 3: Cross multiply
    13,596.76x = 20,395.14 × 8,661.43
  4. Step 4: Simplify right side
    13,596.76x = 176,651,119.18
  5. Step 5: Solve for x
    x = 176,651,119.18/13,596.76
  6. Step 6: Final answer
    x = 12,992.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.