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Finding the Fourth Proportional to 43,265.70, 64,891.80 and 13,690.80

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Solution

The fourth proportional to 43,265.70, 64,891.80 and 13,690.80 is: 20,534.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,265.70 : 64,891.80 = 13,690.80 : x
  2. Step 2: Convert to fraction form
    43,265.70/64,891.80 = 13,690.80/x
  3. Step 3: Cross multiply
    43,265.70x = 64,891.80 × 13,690.80
  4. Step 4: Simplify right side
    43,265.70x = 888,420,655.44
  5. Step 5: Solve for x
    x = 888,420,655.44/43,265.70
  6. Step 6: Final answer
    x = 20,534.06

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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.