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Finding the Fourth Proportional to 28,489.21, 42,733.85 and 7,429.24

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Solution

The fourth proportional to 28,489.21, 42,733.85 and 7,429.24 is: 11,143.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.21 : 42,733.85 = 7,429.24 : x
  2. Step 2: Convert to fraction form
    28,489.21/42,733.85 = 7,429.24/x
  3. Step 3: Cross multiply
    28,489.21x = 42,733.85 × 7,429.24
  4. Step 4: Simplify right side
    28,489.21x = 317,479,845.46
  5. Step 5: Solve for x
    x = 317,479,845.46/28,489.21
  6. Step 6: Final answer
    x = 11,143.86

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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.