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Finding the Fourth Proportional to 28,587.94, 42,884.82 and 9,865.54

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Solution

The fourth proportional to 28,587.94, 42,884.82 and 9,865.54 is: 14,799.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.94 : 42,884.82 = 9,865.54 : x
  2. Step 2: Convert to fraction form
    28,587.94/42,884.82 = 9,865.54/x
  3. Step 3: Cross multiply
    28,587.94x = 42,884.82 × 9,865.54
  4. Step 4: Simplify right side
    28,587.94x = 423,081,907.10
  5. Step 5: Solve for x
    x = 423,081,907.10/28,587.94
  6. Step 6: Final answer
    x = 14,799.31

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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.