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Finding the Fourth Proportional to 20,657.94, 28,507.02 and 11,704.92

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Solution

The fourth proportional to 20,657.94, 28,507.02 and 11,704.92 is: 16,152.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.94 : 28,507.02 = 11,704.92 : x
  2. Step 2: Convert to fraction form
    20,657.94/28,507.02 = 11,704.92/x
  3. Step 3: Cross multiply
    20,657.94x = 28,507.02 × 11,704.92
  4. Step 4: Simplify right side
    20,657.94x = 333,672,388.54
  5. Step 5: Solve for x
    x = 333,672,388.54/20,657.94
  6. Step 6: Final answer
    x = 16,152.26

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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.