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Finding the Fourth Proportional to 28,950, 43,430.64 and 12,309.84

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Solution

The fourth proportional to 28,950, 43,430.64 and 12,309.84 is: 18,467.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,950 : 43,430.64 = 12,309.84 : x
  2. Step 2: Convert to fraction form
    28,950/43,430.64 = 12,309.84/x
  3. Step 3: Cross multiply
    28,950x = 43,430.64 × 12,309.84
  4. Step 4: Simplify right side
    28,950x = 534,624,229.50
  5. Step 5: Solve for x
    x = 534,624,229.50/28,950
  6. Step 6: Final answer
    x = 18,467.16

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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.