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Finding the Fourth Proportional to 13,691.58, 18,902.52 and 8,984.08

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Solution

The fourth proportional to 13,691.58, 18,902.52 and 8,984.08 is: 12,403.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.58 : 18,902.52 = 8,984.08 : x
  2. Step 2: Convert to fraction form
    13,691.58/18,902.52 = 8,984.08/x
  3. Step 3: Cross multiply
    13,691.58x = 18,902.52 × 8,984.08
  4. Step 4: Simplify right side
    13,691.58x = 169,821,751.88
  5. Step 5: Solve for x
    x = 169,821,751.88/13,691.58
  6. Step 6: Final answer
    x = 12,403.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.