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Finding the Fourth Proportional to 28,672.87, 43,009.31 and 8,953.12

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Solution

The fourth proportional to 28,672.87, 43,009.31 and 8,953.12 is: 13,429.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.87 : 43,009.31 = 8,953.12 : x
  2. Step 2: Convert to fraction form
    28,672.87/43,009.31 = 8,953.12/x
  3. Step 3: Cross multiply
    28,672.87x = 43,009.31 × 8,953.12
  4. Step 4: Simplify right side
    28,672.87x = 385,067,513.55
  5. Step 5: Solve for x
    x = 385,067,513.55/28,672.87
  6. Step 6: Final answer
    x = 13,429.68

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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.