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Finding the Fourth Proportional to 18,887.56, 28,308.09 and 8,346.22

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Solution

The fourth proportional to 18,887.56, 28,308.09 and 8,346.22 is: 12,509.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.56 : 28,308.09 = 8,346.22 : x
  2. Step 2: Convert to fraction form
    18,887.56/28,308.09 = 8,346.22/x
  3. Step 3: Cross multiply
    18,887.56x = 28,308.09 × 8,346.22
  4. Step 4: Simplify right side
    18,887.56x = 236,265,476.15
  5. Step 5: Solve for x
    x = 236,265,476.15/18,887.56
  6. Step 6: Final answer
    x = 12,509.05

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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.