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Finding the Fourth Proportional to 28,919.36, 43,380.80 and 14,140.80

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Solution

The fourth proportional to 28,919.36, 43,380.80 and 14,140.80 is: 21,212.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.36 : 43,380.80 = 14,140.80 : x
  2. Step 2: Convert to fraction form
    28,919.36/43,380.80 = 14,140.80/x
  3. Step 3: Cross multiply
    28,919.36x = 43,380.80 × 14,140.80
  4. Step 4: Simplify right side
    28,919.36x = 613,439,216.64
  5. Step 5: Solve for x
    x = 613,439,216.64/28,919.36
  6. Step 6: Final answer
    x = 21,212.06

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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.