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Finding the Fourth Proportional to 28,676.31, 43,013.57 and 7,899.63

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Solution

The fourth proportional to 28,676.31, 43,013.57 and 7,899.63 is: 11,849.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,676.31 : 43,013.57 = 7,899.63 : x
  2. Step 2: Convert to fraction form
    28,676.31/43,013.57 = 7,899.63/x
  3. Step 3: Cross multiply
    28,676.31x = 43,013.57 × 7,899.63
  4. Step 4: Simplify right side
    28,676.31x = 339,791,248.48
  5. Step 5: Solve for x
    x = 339,791,248.48/28,676.31
  6. Step 6: Final answer
    x = 11,849.20

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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.