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Finding the Fourth Proportional to 28,509.84, 42,759.72 and 7,734.96

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Solution

The fourth proportional to 28,509.84, 42,759.72 and 7,734.96 is: 11,601.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509.84 : 42,759.72 = 7,734.96 : x
  2. Step 2: Convert to fraction form
    28,509.84/42,759.72 = 7,734.96/x
  3. Step 3: Cross multiply
    28,509.84x = 42,759.72 × 7,734.96
  4. Step 4: Simplify right side
    28,509.84x = 330,744,723.81
  5. Step 5: Solve for x
    x = 330,744,723.81/28,509.84
  6. Step 6: Final answer
    x = 11,601.07

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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.