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Finding the Fourth Proportional to 28,706.77, 43,064.78 and 9,992.13

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Solution

The fourth proportional to 28,706.77, 43,064.78 and 9,992.13 is: 14,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.77 : 43,064.78 = 9,992.13 : x
  2. Step 2: Convert to fraction form
    28,706.77/43,064.78 = 9,992.13/x
  3. Step 3: Cross multiply
    28,706.77x = 43,064.78 × 9,992.13
  4. Step 4: Simplify right side
    28,706.77x = 430,308,786.94
  5. Step 5: Solve for x
    x = 430,308,786.94/28,706.77
  6. Step 6: Final answer
    x = 14,989.80

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1.5x scale

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.