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Finding the Fourth Proportional to 28,682.98, 42,980.64 and 12,033.98

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Solution

The fourth proportional to 28,682.98, 42,980.64 and 12,033.98 is: 18,032.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,682.98 : 42,980.64 = 12,033.98 : x
  2. Step 2: Convert to fraction form
    28,682.98/42,980.64 = 12,033.98/x
  3. Step 3: Cross multiply
    28,682.98x = 42,980.64 × 12,033.98
  4. Step 4: Simplify right side
    28,682.98x = 517,228,162.15
  5. Step 5: Solve for x
    x = 517,228,162.15/28,682.98
  6. Step 6: Final answer
    x = 18,032.58

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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.