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Finding the Fourth Proportional to 20,009.80, 29,928.30 and 16,899.40

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Solution

The fourth proportional to 20,009.80, 29,928.30 and 16,899.40 is: 25,276.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,009.80 : 29,928.30 = 16,899.40 : x
  2. Step 2: Convert to fraction form
    20,009.80/29,928.30 = 16,899.40/x
  3. Step 3: Cross multiply
    20,009.80x = 29,928.30 × 16,899.40
  4. Step 4: Simplify right side
    20,009.80x = 505,770,313.02
  5. Step 5: Solve for x
    x = 505,770,313.02/20,009.80
  6. Step 6: Final answer
    x = 25,276.13

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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.