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Finding the Fourth Proportional to 19,221.30, 28,785.78 and 9,836.64

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Solution

The fourth proportional to 19,221.30, 28,785.78 and 9,836.64 is: 14,731.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,221.30 : 28,785.78 = 9,836.64 : x
  2. Step 2: Convert to fraction form
    19,221.30/28,785.78 = 9,836.64/x
  3. Step 3: Cross multiply
    19,221.30x = 28,785.78 × 9,836.64
  4. Step 4: Simplify right side
    19,221.30x = 283,155,354.98
  5. Step 5: Solve for x
    x = 283,155,354.98/19,221.30
  6. Step 6: Final answer
    x = 14,731.33

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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.