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Finding the Fourth Proportional to 28,672.70, 43,009.05 and 7,612.70

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Solution

The fourth proportional to 28,672.70, 43,009.05 and 7,612.70 is: 11,419.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.70 : 43,009.05 = 7,612.70 : x
  2. Step 2: Convert to fraction form
    28,672.70/43,009.05 = 7,612.70/x
  3. Step 3: Cross multiply
    28,672.70x = 43,009.05 × 7,612.70
  4. Step 4: Simplify right side
    28,672.70x = 327,414,994.94
  5. Step 5: Solve for x
    x = 327,414,994.94/28,672.70
  6. Step 6: Final answer
    x = 11,419.05

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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.