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Finding the Fourth Proportional to 28,805.66, 39,752.16 and 16,866.62

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Solution

The fourth proportional to 28,805.66, 39,752.16 and 16,866.62 is: 23,276.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,805.66 : 39,752.16 = 16,866.62 : x
  2. Step 2: Convert to fraction form
    28,805.66/39,752.16 = 16,866.62/x
  3. Step 3: Cross multiply
    28,805.66x = 39,752.16 × 16,866.62
  4. Step 4: Simplify right side
    28,805.66x = 670,484,576.90
  5. Step 5: Solve for x
    x = 670,484,576.90/28,805.66
  6. Step 6: Final answer
    x = 23,276.14

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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.