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Finding the Fourth Proportional to 20,684.94, 28,544.94 and 12,616.74

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Solution

The fourth proportional to 20,684.94, 28,544.94 and 12,616.74 is: 17,410.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.94 : 28,544.94 = 12,616.74 : x
  2. Step 2: Convert to fraction form
    20,684.94/28,544.94 = 12,616.74/x
  3. Step 3: Cross multiply
    20,684.94x = 28,544.94 × 12,616.74
  4. Step 4: Simplify right side
    20,684.94x = 360,144,086.30
  5. Step 5: Solve for x
    x = 360,144,086.30/20,684.94
  6. Step 6: Final answer
    x = 17,410.93

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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.