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Finding the Fourth Proportional to 28,776.86, 39,706.80 and 16,029.73

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Solution

The fourth proportional to 28,776.86, 39,706.80 and 16,029.73 is: 22,118.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,776.86 : 39,706.80 = 16,029.73 : x
  2. Step 2: Convert to fraction form
    28,776.86/39,706.80 = 16,029.73/x
  3. Step 3: Cross multiply
    28,776.86x = 39,706.80 × 16,029.73
  4. Step 4: Simplify right side
    28,776.86x = 636,489,150.26
  5. Step 5: Solve for x
    x = 636,489,150.26/28,776.86
  6. Step 6: Final answer
    x = 22,118.09

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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.