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Finding the Fourth Proportional to 29,628.80, 44,421.60 and 12,089.60

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Solution

The fourth proportional to 29,628.80, 44,421.60 and 12,089.60 is: 18,125.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,628.80 : 44,421.60 = 12,089.60 : x
  2. Step 2: Convert to fraction form
    29,628.80/44,421.60 = 12,089.60/x
  3. Step 3: Cross multiply
    29,628.80x = 44,421.60 × 12,089.60
  4. Step 4: Simplify right side
    29,628.80x = 537,039,375.36
  5. Step 5: Solve for x
    x = 537,039,375.36/29,628.80
  6. Step 6: Final answer
    x = 18,125.59

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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.