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Finding the Fourth Proportional to 28,890.56, 43,326.08 and 8,109.12

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Solution

The fourth proportional to 28,890.56, 43,326.08 and 8,109.12 is: 12,160.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.56 : 43,326.08 = 8,109.12 : x
  2. Step 2: Convert to fraction form
    28,890.56/43,326.08 = 8,109.12/x
  3. Step 3: Cross multiply
    28,890.56x = 43,326.08 × 8,109.12
  4. Step 4: Simplify right side
    28,890.56x = 351,336,381.85
  5. Step 5: Solve for x
    x = 351,336,381.85/28,890.56
  6. Step 6: Final answer
    x = 12,160.94

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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.