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Finding the Fourth Proportional to 28,415.93, 42,629.99 and 8,693.82

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Solution

The fourth proportional to 28,415.93, 42,629.99 and 8,693.82 is: 13,042.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.93 : 42,629.99 = 8,693.82 : x
  2. Step 2: Convert to fraction form
    28,415.93/42,629.99 = 8,693.82/x
  3. Step 3: Cross multiply
    28,415.93x = 42,629.99 × 8,693.82
  4. Step 4: Simplify right side
    28,415.93x = 370,617,416.19
  5. Step 5: Solve for x
    x = 370,617,416.19/28,415.93
  6. Step 6: Final answer
    x = 13,042.60

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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.