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Finding the Fourth Proportional to 10,380.80, 15,538.80 and 7,464.80

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Solution

The fourth proportional to 10,380.80, 15,538.80 and 7,464.80 is: 11,173.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,380.80 : 15,538.80 = 7,464.80 : x
  2. Step 2: Convert to fraction form
    10,380.80/15,538.80 = 7,464.80/x
  3. Step 3: Cross multiply
    10,380.80x = 15,538.80 × 7,464.80
  4. Step 4: Simplify right side
    10,380.80x = 115,994,034.24
  5. Step 5: Solve for x
    x = 115,994,034.24/10,380.80
  6. Step 6: Final answer
    x = 11,173.90

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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.