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Finding the Fourth Proportional to 28,530.57, 42,805.99 and 12,734.17

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Solution

The fourth proportional to 28,530.57, 42,805.99 and 12,734.17 is: 19,105.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.57 : 42,805.99 = 12,734.17 : x
  2. Step 2: Convert to fraction form
    28,530.57/42,805.99 = 12,734.17/x
  3. Step 3: Cross multiply
    28,530.57x = 42,805.99 × 12,734.17
  4. Step 4: Simplify right side
    28,530.57x = 545,098,539.65
  5. Step 5: Solve for x
    x = 545,098,539.65/28,530.57
  6. Step 6: Final answer
    x = 19,105.77

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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.