Home / 43,921.45-65,919.13-18,980.40

Finding the Fourth Proportional to 43,921.45, 65,919.13 and 18,980.40

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Solution

The fourth proportional to 43,921.45, 65,919.13 and 18,980.40 is: 28,486.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,921.45 : 65,919.13 = 18,980.40 : x
  2. Step 2: Convert to fraction form
    43,921.45/65,919.13 = 18,980.40/x
  3. Step 3: Cross multiply
    43,921.45x = 65,919.13 × 18,980.40
  4. Step 4: Simplify right side
    43,921.45x = 1,251,171,407.60
  5. Step 5: Solve for x
    x = 1,251,171,407.60/43,921.45
  6. Step 6: Final answer
    x = 28,486.57

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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.