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Finding the Fourth Proportional to 8,909.90, 13,361.09 and 2,670.80

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Solution

The fourth proportional to 8,909.90, 13,361.09 and 2,670.80 is: 4,005.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.90 : 13,361.09 = 2,670.80 : x
  2. Step 2: Convert to fraction form
    8,909.90/13,361.09 = 2,670.80/x
  3. Step 3: Cross multiply
    8,909.90x = 13,361.09 × 2,670.80
  4. Step 4: Simplify right side
    8,909.90x = 35,684,799.17
  5. Step 5: Solve for x
    x = 35,684,799.17/8,909.90
  6. Step 6: Final answer
    x = 4,005.07

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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.