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Finding the Fourth Proportional to 28,706.75, 39,619.03 and 16,131.50

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Solution

The fourth proportional to 28,706.75, 39,619.03 and 16,131.50 is: 22,263.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.75 : 39,619.03 = 16,131.50 : x
  2. Step 2: Convert to fraction form
    28,706.75/39,619.03 = 16,131.50/x
  3. Step 3: Cross multiply
    28,706.75x = 39,619.03 × 16,131.50
  4. Step 4: Simplify right side
    28,706.75x = 639,114,382.45
  5. Step 5: Solve for x
    x = 639,114,382.45/28,706.75
  6. Step 6: Final answer
    x = 22,263.56

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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.