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Finding the Fourth Proportional to 16,857.60, 25,286.40 and 13,358.40

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Solution

The fourth proportional to 16,857.60, 25,286.40 and 13,358.40 is: 20,037.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,857.60 : 25,286.40 = 13,358.40 : x
  2. Step 2: Convert to fraction form
    16,857.60/25,286.40 = 13,358.40/x
  3. Step 3: Cross multiply
    16,857.60x = 25,286.40 × 13,358.40
  4. Step 4: Simplify right side
    16,857.60x = 337,785,845.76
  5. Step 5: Solve for x
    x = 337,785,845.76/16,857.60
  6. Step 6: Final answer
    x = 20,037.60

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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.