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Finding the Fourth Proportional to 18,899.64, 28,355.00 and 7,806.96

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Solution

The fourth proportional to 18,899.64, 28,355.00 and 7,806.96 is: 11,712.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,899.64 : 28,355.00 = 7,806.96 : x
  2. Step 2: Convert to fraction form
    18,899.64/28,355.00 = 7,806.96/x
  3. Step 3: Cross multiply
    18,899.64x = 28,355.00 × 7,806.96
  4. Step 4: Simplify right side
    18,899.64x = 221,366,311.77
  5. Step 5: Solve for x
    x = 221,366,311.77/18,899.64
  6. Step 6: Final answer
    x = 11,712.73

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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.