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Finding the Fourth Proportional to 43,991.64, 65,987.38 and 12,401.64

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Solution

The fourth proportional to 43,991.64, 65,987.38 and 12,401.64 is: 18,602.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,991.64 : 65,987.38 = 12,401.64 : x
  2. Step 2: Convert to fraction form
    43,991.64/65,987.38 = 12,401.64/x
  3. Step 3: Cross multiply
    43,991.64x = 65,987.38 × 12,401.64
  4. Step 4: Simplify right side
    43,991.64x = 818,351,731.30
  5. Step 5: Solve for x
    x = 818,351,731.30/43,991.64
  6. Step 6: Final answer
    x = 18,602.44

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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.