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Finding the Fourth Proportional to 13,714.80, 20,543.40 and 7,551.60

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Solution

The fourth proportional to 13,714.80, 20,543.40 and 7,551.60 is: 11,311.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,714.80 : 20,543.40 = 7,551.60 : x
  2. Step 2: Convert to fraction form
    13,714.80/20,543.40 = 7,551.60/x
  3. Step 3: Cross multiply
    13,714.80x = 20,543.40 × 7,551.60
  4. Step 4: Simplify right side
    13,714.80x = 155,135,539.44
  5. Step 5: Solve for x
    x = 155,135,539.44/13,714.80
  6. Step 6: Final answer
    x = 11,311.54

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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.