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Finding the Fourth Proportional to 28,674.80, 43,012.20 and 19,343.60

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Solution

The fourth proportional to 28,674.80, 43,012.20 and 19,343.60 is: 29,015.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,674.80 : 43,012.20 = 19,343.60 : x
  2. Step 2: Convert to fraction form
    28,674.80/43,012.20 = 19,343.60/x
  3. Step 3: Cross multiply
    28,674.80x = 43,012.20 × 19,343.60
  4. Step 4: Simplify right side
    28,674.80x = 832,010,791.92
  5. Step 5: Solve for x
    x = 832,010,791.92/28,674.80
  6. Step 6: Final answer
    x = 29,015.40

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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.