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Finding the Fourth Proportional to 19,188.56, 28,786.12 and 8,801.20

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Solution

The fourth proportional to 19,188.56, 28,786.12 and 8,801.20 is: 13,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,188.56 : 28,786.12 = 8,801.20 : x
  2. Step 2: Convert to fraction form
    19,188.56/28,786.12 = 8,801.20/x
  3. Step 3: Cross multiply
    19,188.56x = 28,786.12 × 8,801.20
  4. Step 4: Simplify right side
    19,188.56x = 253,352,399.34
  5. Step 5: Solve for x
    x = 253,352,399.34/19,188.56
  6. Step 6: Final answer
    x = 13,203.30

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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.