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Finding the Fourth Proportional to 20,728.35, 28,600.02 and 12,659.94

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Solution

The fourth proportional to 20,728.35, 28,600.02 and 12,659.94 is: 17,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.35 : 28,600.02 = 12,659.94 : x
  2. Step 2: Convert to fraction form
    20,728.35/28,600.02 = 12,659.94/x
  3. Step 3: Cross multiply
    20,728.35x = 28,600.02 × 12,659.94
  4. Step 4: Simplify right side
    20,728.35x = 362,074,537.20
  5. Step 5: Solve for x
    x = 362,074,537.20/20,728.35
  6. Step 6: Final answer
    x = 17,467.60

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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.