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Finding the Fourth Proportional to 12,482.59, 18,721.86 and 4,162.68

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Solution

The fourth proportional to 12,482.59, 18,721.86 and 4,162.68 is: 6,243.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,482.59 : 18,721.86 = 4,162.68 : x
  2. Step 2: Convert to fraction form
    12,482.59/18,721.86 = 4,162.68/x
  3. Step 3: Cross multiply
    12,482.59x = 18,721.86 × 4,162.68
  4. Step 4: Simplify right side
    12,482.59x = 77,933,112.18
  5. Step 5: Solve for x
    x = 77,933,112.18/12,482.59
  6. Step 6: Final answer
    x = 6,243.34

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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.