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Finding the Fourth Proportional to 18,699.88, 28,046.56 and 4,848.88

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Solution

The fourth proportional to 18,699.88, 28,046.56 and 4,848.88 is: 7,272.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.88 : 28,046.56 = 4,848.88 : x
  2. Step 2: Convert to fraction form
    18,699.88/28,046.56 = 4,848.88/x
  3. Step 3: Cross multiply
    18,699.88x = 28,046.56 × 4,848.88
  4. Step 4: Simplify right side
    18,699.88x = 135,994,403.85
  5. Step 5: Solve for x
    x = 135,994,403.85/18,699.88
  6. Step 6: Final answer
    x = 7,272.47

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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.