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Finding the Fourth Proportional to 28,509.84, 42,766.50 and 10,979.69

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Solution

The fourth proportional to 28,509.84, 42,766.50 and 10,979.69 is: 16,470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509.84 : 42,766.50 = 10,979.69 : x
  2. Step 2: Convert to fraction form
    28,509.84/42,766.50 = 10,979.69/x
  3. Step 3: Cross multiply
    28,509.84x = 42,766.50 × 10,979.69
  4. Step 4: Simplify right side
    28,509.84x = 469,562,698.55
  5. Step 5: Solve for x
    x = 469,562,698.55/28,509.84
  6. Step 6: Final answer
    x = 16,470.20

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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.