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Finding the Fourth Proportional to 18,761.60, 25,913.04 and 14,997.80

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Solution

The fourth proportional to 18,761.60, 25,913.04 and 14,997.80 is: 20,714.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.60 : 25,913.04 = 14,997.80 : x
  2. Step 2: Convert to fraction form
    18,761.60/25,913.04 = 14,997.80/x
  3. Step 3: Cross multiply
    18,761.60x = 25,913.04 × 14,997.80
  4. Step 4: Simplify right side
    18,761.60x = 388,638,591.31
  5. Step 5: Solve for x
    x = 388,638,591.31/18,761.60
  6. Step 6: Final answer
    x = 20,714.58

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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.