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Finding the Fourth Proportional to 28,676.39, 43,021.89 and 8,955.14

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Solution

The fourth proportional to 28,676.39, 43,021.89 and 8,955.14 is: 13,434.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,676.39 : 43,021.89 = 8,955.14 : x
  2. Step 2: Convert to fraction form
    28,676.39/43,021.89 = 8,955.14/x
  3. Step 3: Cross multiply
    28,676.39x = 43,021.89 × 8,955.14
  4. Step 4: Simplify right side
    28,676.39x = 385,266,832.91
  5. Step 5: Solve for x
    x = 385,266,832.91/28,676.39
  6. Step 6: Final answer
    x = 13,434.99

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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.