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Finding the Fourth Proportional to 28,885.80, 43,326.72 and 8,109.30

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Solution

The fourth proportional to 28,885.80, 43,326.72 and 8,109.30 is: 12,163.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,885.80 : 43,326.72 = 8,109.30 : x
  2. Step 2: Convert to fraction form
    28,885.80/43,326.72 = 8,109.30/x
  3. Step 3: Cross multiply
    28,885.80x = 43,326.72 × 8,109.30
  4. Step 4: Simplify right side
    28,885.80x = 351,349,370.50
  5. Step 5: Solve for x
    x = 351,349,370.50/28,885.80
  6. Step 6: Final answer
    x = 12,163.39

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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.