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Finding the Fourth Proportional to 28,518.76, 42,784.24 and 8,529.82

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Solution

The fourth proportional to 28,518.76, 42,784.24 and 8,529.82 is: 12,796.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.76 : 42,784.24 = 8,529.82 : x
  2. Step 2: Convert to fraction form
    28,518.76/42,784.24 = 8,529.82/x
  3. Step 3: Cross multiply
    28,518.76x = 42,784.24 × 8,529.82
  4. Step 4: Simplify right side
    28,518.76x = 364,941,630.79
  5. Step 5: Solve for x
    x = 364,941,630.79/28,518.76
  6. Step 6: Final answer
    x = 12,796.55

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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.