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Finding the Fourth Proportional to 28,706.67, 43,059.63 and 9,986.34

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Solution

The fourth proportional to 28,706.67, 43,059.63 and 9,986.34 is: 14,979.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.67 : 43,059.63 = 9,986.34 : x
  2. Step 2: Convert to fraction form
    28,706.67/43,059.63 = 9,986.34/x
  3. Step 3: Cross multiply
    28,706.67x = 43,059.63 × 9,986.34
  4. Step 4: Simplify right side
    28,706.67x = 430,008,105.45
  5. Step 5: Solve for x
    x = 430,008,105.45/28,706.67
  6. Step 6: Final answer
    x = 14,979.38

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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.