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Finding the Fourth Proportional to 7,781.04, 11,671.54 and 2,520.43

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Solution

The fourth proportional to 7,781.04, 11,671.54 and 2,520.43 is: 3,780.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.04 : 11,671.54 = 2,520.43 : x
  2. Step 2: Convert to fraction form
    7,781.04/11,671.54 = 2,520.43/x
  3. Step 3: Cross multiply
    7,781.04x = 11,671.54 × 2,520.43
  4. Step 4: Simplify right side
    7,781.04x = 29,417,299.56
  5. Step 5: Solve for x
    x = 29,417,299.56/7,781.04
  6. Step 6: Final answer
    x = 3,780.64

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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.