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Finding the Fourth Proportional to 28,578.87, 39,458.09 and 17,840.09

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Solution

The fourth proportional to 28,578.87, 39,458.09 and 17,840.09 is: 24,631.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.87 : 39,458.09 = 17,840.09 : x
  2. Step 2: Convert to fraction form
    28,578.87/39,458.09 = 17,840.09/x
  3. Step 3: Cross multiply
    28,578.87x = 39,458.09 × 17,840.09
  4. Step 4: Simplify right side
    28,578.87x = 703,935,977.83
  5. Step 5: Solve for x
    x = 703,935,977.83/28,578.87
  6. Step 6: Final answer
    x = 24,631.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.