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Finding the Fourth Proportional to 8,380.80, 11,750.40 and 8,380.80

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Solution

The fourth proportional to 8,380.80, 11,750.40 and 8,380.80 is: 11,750.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,380.80 : 11,750.40 = 8,380.80 : x
  2. Step 2: Convert to fraction form
    8,380.80/11,750.40 = 8,380.80/x
  3. Step 3: Cross multiply
    8,380.80x = 11,750.40 × 8,380.80
  4. Step 4: Simplify right side
    8,380.80x = 98,477,752.32
  5. Step 5: Solve for x
    x = 98,477,752.32/8,380.80
  6. Step 6: Final answer
    x = 11,750.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.