Home / 16,905.80-25,358.70-12,969.20

Finding the Fourth Proportional to 16,905.80, 25,358.70 and 12,969.20

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Solution

The fourth proportional to 16,905.80, 25,358.70 and 12,969.20 is: 19,453.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,905.80 : 25,358.70 = 12,969.20 : x
  2. Step 2: Convert to fraction form
    16,905.80/25,358.70 = 12,969.20/x
  3. Step 3: Cross multiply
    16,905.80x = 25,358.70 × 12,969.20
  4. Step 4: Simplify right side
    16,905.80x = 328,882,052.04
  5. Step 5: Solve for x
    x = 328,882,052.04/16,905.80
  6. Step 6: Final answer
    x = 19,453.80

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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.