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Finding the Fourth Proportional to 28,993.76, 43,490.64 and 7,105.76

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Solution

The fourth proportional to 28,993.76, 43,490.64 and 7,105.76 is: 10,658.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,993.76 : 43,490.64 = 7,105.76 : x
  2. Step 2: Convert to fraction form
    28,993.76/43,490.64 = 7,105.76/x
  3. Step 3: Cross multiply
    28,993.76x = 43,490.64 × 7,105.76
  4. Step 4: Simplify right side
    28,993.76x = 309,034,050.09
  5. Step 5: Solve for x
    x = 309,034,050.09/28,993.76
  6. Step 6: Final answer
    x = 10,658.64

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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.