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Finding the Fourth Proportional to 28,961.76, 43,446.40 and 8,185.76

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Solution

The fourth proportional to 28,961.76, 43,446.40 and 8,185.76 is: 12,279.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,961.76 : 43,446.40 = 8,185.76 : x
  2. Step 2: Convert to fraction form
    28,961.76/43,446.40 = 8,185.76/x
  3. Step 3: Cross multiply
    28,961.76x = 43,446.40 × 8,185.76
  4. Step 4: Simplify right side
    28,961.76x = 355,641,803.26
  5. Step 5: Solve for x
    x = 355,641,803.26/28,961.76
  6. Step 6: Final answer
    x = 12,279.70

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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.