Home / 16,905.20-25,382.10-13,211.60

Finding the Fourth Proportional to 16,905.20, 25,382.10 and 13,211.60

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Solution

The fourth proportional to 16,905.20, 25,382.10 and 13,211.60 is: 19,836.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,905.20 : 25,382.10 = 13,211.60 : x
  2. Step 2: Convert to fraction form
    16,905.20/25,382.10 = 13,211.60/x
  3. Step 3: Cross multiply
    16,905.20x = 25,382.10 × 13,211.60
  4. Step 4: Simplify right side
    16,905.20x = 335,338,152.36
  5. Step 5: Solve for x
    x = 335,338,152.36/16,905.20
  6. Step 6: Final answer
    x = 19,836.39

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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.