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Finding the Fourth Proportional to 43,781.64, 65,672.70 and 12,617.64

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Solution

The fourth proportional to 43,781.64, 65,672.70 and 12,617.64 is: 18,926.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,781.64 : 65,672.70 = 12,617.64 : x
  2. Step 2: Convert to fraction form
    43,781.64/65,672.70 = 12,617.64/x
  3. Step 3: Cross multiply
    43,781.64x = 65,672.70 × 12,617.64
  4. Step 4: Simplify right side
    43,781.64x = 828,634,486.43
  5. Step 5: Solve for x
    x = 828,634,486.43/43,781.64
  6. Step 6: Final answer
    x = 18,926.53

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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.