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Finding the Fourth Proportional to 28,992.52, 43,488.78 and 13,408.12

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Solution

The fourth proportional to 28,992.52, 43,488.78 and 13,408.12 is: 20,112.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,992.52 : 43,488.78 = 13,408.12 : x
  2. Step 2: Convert to fraction form
    28,992.52/43,488.78 = 13,408.12/x
  3. Step 3: Cross multiply
    28,992.52x = 43,488.78 × 13,408.12
  4. Step 4: Simplify right side
    28,992.52x = 583,102,780.89
  5. Step 5: Solve for x
    x = 583,102,780.89/28,992.52
  6. Step 6: Final answer
    x = 20,112.18

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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.