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Finding the Fourth Proportional to 12,785.60, 19,221.60 and 10,884.80

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Solution

The fourth proportional to 12,785.60, 19,221.60 and 10,884.80 is: 16,363.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.60 : 19,221.60 = 10,884.80 : x
  2. Step 2: Convert to fraction form
    12,785.60/19,221.60 = 10,884.80/x
  3. Step 3: Cross multiply
    12,785.60x = 19,221.60 × 10,884.80
  4. Step 4: Simplify right side
    12,785.60x = 209,223,271.68
  5. Step 5: Solve for x
    x = 209,223,271.68/12,785.60
  6. Step 6: Final answer
    x = 16,363.98

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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.