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Finding the Fourth Proportional to 28,578.76, 42,866.48 and 8,587.82

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Solution

The fourth proportional to 28,578.76, 42,866.48 and 8,587.82 is: 12,881.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.76 : 42,866.48 = 8,587.82 : x
  2. Step 2: Convert to fraction form
    28,578.76/42,866.48 = 8,587.82/x
  3. Step 3: Cross multiply
    28,578.76x = 42,866.48 × 8,587.82
  4. Step 4: Simplify right side
    28,578.76x = 368,129,614.27
  5. Step 5: Solve for x
    x = 368,129,614.27/28,578.76
  6. Step 6: Final answer
    x = 12,881.23

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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.