Home / 18,918.11-28,380.81-6,437.63

Finding the Fourth Proportional to 18,918.11, 28,380.81 and 6,437.63

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Solution

The fourth proportional to 18,918.11, 28,380.81 and 6,437.63 is: 9,657.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.11 : 28,380.81 = 6,437.63 : x
  2. Step 2: Convert to fraction form
    18,918.11/28,380.81 = 6,437.63/x
  3. Step 3: Cross multiply
    18,918.11x = 28,380.81 × 6,437.63
  4. Step 4: Simplify right side
    18,918.11x = 182,705,153.88
  5. Step 5: Solve for x
    x = 182,705,153.88/18,918.11
  6. Step 6: Final answer
    x = 9,657.69

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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.